In our Shooters’ Forum, one member recently asked: “What makes an AR accurate? What parts on an AR can really affect accuracy — such as free-floating handguards, barrels, bolts, bolt carriers?” He wanted an honest, well-informed answer, not just sales pitches. Robert Whitley posted a very comprehensive answer to this question, based on his experience building and testing dozens of AR-platform rifles. Robert runs AR-X Enterprises, which produces match-grade uppers for High Power competitors, tactical shooters, and varminters.
Building an Accurate AR — What is Most Important
by Robert Whitley
There are a lot of things that can be done to an AR to enhance consistent accuracy, and I use the words “consistent accuracy” because consistency is a part of it (i.e. plenty of guns will give a couple great 5-shot groups, but won’t do a very good 10- or 20-shot groups, and some guns will shoot great one day and not so good on others).
Here are 14 key things we think are important to accuracy.
1. Great Barrel: You’ll want a premium match-grade barrel, well-machined with a good crown and a match-type chambering, true to the bore and well cut. The extension threads must also be cut true to the bore, with everything true and in proper alignment.
2. Rigid Upper: A rigid, heavy-walled upper receiver aids accuracy. The typical AR upper receiver was made for a lightweight carry rifle and they stripped all the metal they could off it to make it light to carry (which is advantageous for the military). The net result are upper receivers that are so thin you can flex them with your bare hands. These flexible uppers are “strong enough” for general use, but they are not ideal for accuracy. Accuracy improves with a more rigid upper receiver.
3. True Receiver Face: We’ve found that truing the receiver face is valuable. Some may argue this point but it is always best to keep everything related to the barrel and the bore in complete alignment with the bore (i.e. barrel extension, bolt, upper receiver, carrier, etc.).
4. Barrel Extension: You should Loctite or glue the barrel extension into the upper receiver. This holds it in place all the way front to back in the upper receiver. Otherwise if there is any play (and there typically is) it just hangs on the face of the upper receiver completely dependent on the face of the upper receiver as the sole source of support for the barrel as opposed to being made more an integral part of the upper receiver by being glued-in.
5. Gas Block: You want a gas block that does not impose pointed stress on the barrel. Clamp-on types that grab all the way around the barrel are excellent. The blocks that are pinned on with tapered pins that wedge against the barrel or the slip on type of block with set screws that push up from underneath (or directly on the barrel) can deform the bore inside of the barrel and can wreck the accuracy of an otherwise great barrel.
6. Free-Float Handguard: A rigid, free-float handguard (and I emphasize the word rigid) really makes a difference. There are many types of free-float handguards and a free-float handguard is, in and of itself, a huge improvement over a non-free-float set up, but best is a rigid set-up. Some of the ones on the market are small diameter, thin and/or flexible and if you are shooting off any type of rest, bipod, front bag, etc., a rigid fore-end is best since ARs want to jump, bounce and twist when you let a shot go, as the carrier starts to begin its cycle before the bullet exits the bore.
7. Barrel Contour: You want some meat on the barrel. Between the upper receiver and the gas block don’t go real thin with a barrel (we like 1″ diameter if it’s workable weight-wise). When you touch off a round and the bullet passes the gas port, the gas system immediately starts pressuring up with a gas impulse that provides vibrations and stress on the barrel, especially between the gas block back to the receiver. A heavier barrel here dampens that. Staying a little heavier with barrel contour through the gas block area and out to the muzzle is good for the same reasons. ARs have a lot going on when you touch off a round and the gas system pressures up and the carrier starts moving (all before the bullet exits the bore) so the more things are made heavier and rigid to counteract that the better — within reason (I’m not advocating a 12-lb barrel).
8. Gas Tube Routing Clearance: You want a gas tube that runs freely through the barrel nut, through the front of the upper receiver, and through the gas key in the carrier. Ensure the gas tube is not impinged by any of them, so that it does not load the carrier in a stressed orientation. You don’t want the gas tube bound up so that when the gas tube pressures up it immediately wants to transmit more force and impulse to the barrel than would normally occur. We sometimes spend a lot of time moving the gas block with gas tube on and off new build uppers and tweaking gas tubes to get proper clearance and alignment. Most gas tubes do need a little “tweaking” to get them right — factory tubes may work OK but they typically do not function optimally without hand-fitting.
9. Gas Port Tuning: You want to avoid over-porting the gas port. Being over-gassed makes the gas system pressure up earlier and more aggressively. This causes more impulse, and increases forces and vibration affecting the top end and the barrel. Tune the gas port to give the amount of pressure needed to function properly and adequately but no more.
10. Front/Back Bolt Play: If accuracy is the game, don’t leave a lot of front/back bolt play (keep it .003″ but no more than .005″). We’ve seen factory rifles run .012″ to .015″ play, which is OK if you need to leave room for dirt and grime in a military application. However, that amount of play is not ideal for a high-accuracy AR build. A lot of front/back bolt play allows rounds to be hammered into the chamber and actually re-formed in a non-consistent way, as they are loaded into the chamber.
11. Component Quality: Use good parts from a reputable source and be wary of “gun show specials”. All parts are NOT the same. Some are good, some are not so good, and some aftermarket parts are simply bad. Don’t be afraid to use mil-spec-type carriers; by and large they are excellent for an accuracy build. Also, remember that just because a carrier says “National Match” or something else on it does not necessarily mean it’s any better. Be wary of chrome-plated parts as the chrome plating can change the parts dimensionally and can also make it hard to do hand-fitting for fit and function.
12. Upper to Lower Fit: A good upper/lower fit is helpful. For quick and dirty fit enhancement, an Accu-Wedge in the rear helps a lot. The ultimate solution is to bed the upper to a specific lower so that the upper and lower, when together, are more like one integral unit. For the upper receivers we produce, we try to get the specs as close as we can, but still fit the various lowers in the market place.
13. Muzzle Attachments: Don’t screw up the muzzle (literally). Leave as much metal on the barrel at the muzzle as you can. People like to thread the muzzle for a flash hider, suppressor, muzzle brake, or some other attachment, but if you really want accuracy, leave as much metal as you can there. And, if you have something that screws on, set it up so that it can be put on and have it stay there without putting a lot of torque and stress on it right where the bullet exits the bore. If you are going to thread the end of the barrel, make it concentric with the bore and make sure what you screw on there is as well. For all muzzle attachments, also ensure that the holes through which the bullet passes through are dead true to the bore. Many aftermarket screw-on things are not so good that way. Anything that vents gas should vent symmetrically (i.e. if it vents left, it should vent equally right, and likewise, if it vents up, it should vent down equally). Uneven venting of gas can wreck accuracy.
14. Quality Ammunition: Ammo is a whole story by itself, but loads that are too hot typically shoot poorly in an AR-15. If you want accuracy out of an AR-15, avoid overly hot loads. Shown below are test groups shot with four (4) different uppers, all with moderate loads. These four uppers all pretty much had the same features and things done to them as explained in this article, and they all shot great.
Curious about suppressors (aka “silencers”, “moderators”, or “cans”)? Below you’ll find an informative NSSF Infographic that covers the history, legal status, design, and operation of modern-day suppressors.
Here’s a cool video showing how suppressors work. This video features see-through rifle suppressors filmed with ultra-high-speed (110,000 frame per second) cameras. When played back in super-slow-motion, you can see the flame propagate through the suppressor and the bullet move through each baffle before it exists the muzzle. Check it out!
See Through Suppressor in Super Slow Motion (110,000 fps) — Click Arrow to Watch:
Suppressor Facts — What You Need to Know
In this infographic, the NSSF provides the history, specifications, benefits and uses of firearm suppressors. Don’t suppress your knowledge!
Suppressors reduce gunfire sound levels by using baffles that contain expanding gasses exiting a firearm’s muzzle when ammo is discharged. Suppressors are similar to car mufflers that were, in fact, developed in parallel by the same inventor in the early 1900s. Well-designed suppressors typically reduce the gun sound levels by 30-35 decibels (dB). Suppressors are becoming more popular even though it still takes many months to get approved. In fact, the number of suppressors registered with the ATF grew by over 1 million from 2011 to 2017. That’s a 355% increase.
Mc3™ Stocks is running a big Cyber Monday Sale. Now through December 3, 2019 at 11:59 pm Mc3 stocks are available for 25% OFF. All Mc3 stocks come from the factory with precision inletting and aluminum pillars for a precise, drop-in fit. Mc3 stocks combine field-proven McMillan designs with advanced materials to deliver a custom feel in a very affordable package. Visit www.MC3STOCKS.com and use promo code CYBER25 at checkout to receive 25% OFF.
Use Promo Code: CYBER25 | Sale ends Tuesday, December 3rd at 11:59 pm MST
Mc3 Stocks are designed, engineered, and manufactured by McMillan to deliver perfect fit plus outstanding performance for the price. Mc3 stocks are constructed from a state-of-the-art proprietary polymer blend called Zenolite, resulting in a stronger, stiffer stock. These stocks are modeled after some of McMillan’s best-selling stocks and compatible with most Remington 700 models.
For example, the Mc3 Tradition Stock is available for short- and long-action Remington 700 rifles. The Mc3 Tradition Stock weighs 2.8-3 lbs., includes a one-inch McMillan recoil pad by Pachmayr, two front sling studs, one rear sling stud, and new finish options: Tan, Olive, Carbon Fiber Black, Painted FDE Transition, Painted Sonoran Transition, and Painted Woodland Transition. This stock is also competitively priced between $269.00 and $319.00.
At the request of our readers, we provide select “Deals of the Week”. Every Sunday afternoon or Monday morning we offer our Best Bargain selections. Here are some of the best deals on firearms, hardware, reloading components, optics, and shooting accessories. Be aware that sale prices are subject to change, and once clearance inventory is sold, it’s gone for good. You snooze you lose.
1. Amazon — ADDTOP Power Bank with Solar Panels, $39.99
Power — modern shooters need mobile battery power to run a LabRadar, charge a Tablet monitoring a Target Camera, or charge you smartphone running a Ballistics App. Here’s one of the best compact USB-port batteries you can buy. This offers 25000 mAh of energy, PLUS it has four solar panels (one built-in, three external). This ADDTOP Power Bank is on sale now for $39.99 on Amazon, a good deal.
These days, every serious rifleman can really use a tablet computer. Use it with WiFi target-cam systems. Run Ballistics and Reloading Apps. And plug in a $49.99 Teslong endoscope to monitor your bore. This 10″ Samsung Galaxy Tab boasts a 2019 Android OS, long (13-hr) battery life, and easy MicroSD memory boosting. Right now this Samsung is on sale for $147.00 with Free Shipping, a great deal. Or order for $156.99 with 64GB MicroSD card (the BEST DEAL).
3. Cutting Edge Bullets — 25% Off $150+ Orders
Cutting Edge Bullets crafts some of the best-performing projectiles for extreme long range (ELR) shooting. Cutting Edge Solids have set many records. And now you can get these great bullets for 25% OFF. But act soon. This deal is for TODAY ONLY, December 2, 2019. Use Code CYBER19 to get25% OFF all orders over $150.00, with FREE Shipping.
4. Brownells — Electronic Muffs, $24.99 (40% Off)
Brownells new, Second Generation Premium Electronic Earmuffs incorporate dual microphones that let you hear range commmand while suppressing harmful noises. These affordable muffs fold for easy storage, and you can plug your smartphone into the 3.5mm input jack. Right now these muffs are discounted from $41.99 to $24.99 — a 40% savings!
5. Midsouth — Hornady 6.5 Creedmoor Brass and 140gr Bullets
Do you shoot a 6.5 Creedmoor? Well here’s the deal of the year on 6.5 Creedmoor brass and bullets. Get 100 pieces of Hornady 6.5mm Creedmoor Brass for just $34.99. Then add Hornady 6.5mm 140gr ELD Bullets at $64.99/250. That’s just $24.99 per 100, an awesome deal.
The LabRadar is arguably the most sophisticated consumer chronograph on the market. These units rarely go on sale — but here’s your chance. Right now you can now get a LabRadar for $499.95 — that’s $60 off the normal price. (Sale price good through December 2, 2019). Purchase direct from Mylabradar.com, or order for $499.95 from leading vendors Midsouth Shooters, Bruno’s, and Creedmoor Sports.
7. EuroOptic — 15% OFF Nightforce NXS and SHV Scopes
Nightforce Optics makes great scopes for all disciplines. You’ll see Nightforces on the rifles of top benchrest, F-Class, and PRS/NRL competitors. Right now EuroOptic is running a big Nightforce promo. Save 15% on Nightforce NXS or SHV scopes. No rebate forms needed — the 15% savings is processed when you buy.
8. Powder Valley — Free HazMat Through 12/2/2019 — All Brands
Need powder and/or primers? Then head over to Powder Valley. Starting November 29, 2019 (this coming Friday), you can get FREE HazMat for all brands of reloading powders and primers with orders over $179.00. And yes you can combine powder and primers in the same shipment. This FREE HazMat offer runs through December 2, 2019. Go to PowderValleyInc.com and select FREE HazMat during checkout, starting Friday November 29th.
9. SIG Sauer — Huge Optics Sale, up to 60% Off
Now through midnight December 2, 2019, save up to 60% on SIG Sauer riflescopes, red dot sights, rangefinders, binoculars and spotting scopes while supplies last. Choose from 58 different styles. There are some great deals to be had, with prices slashed up to 60%. But ACT SOON, this is a one-day-only sale!
10. Bushmaster Firearms — 50% Off Entire Site Today Only
Bushmaster Firearms is running a big sale today with 50% Savings on uppers, lowers, muzzle brakes, mags, cleaning supplies and more. There are some truly impressive deals. But you better jump on it — the Sale ends 12/2/2019 at 11:59 pm EDT.
11. AREA 419 — CZ 457 MTR Fully Loaded, $950
Tactical-style .22 LR rimfire rifles permit PRS/NRL shooters to cross-train effectively with low-cost ammo. The new CZ 527 MTR is a great platform for a rimfire precision custom. Area 419 has developed a cool 527 MTR-based rig with all the bells and whistles. Area 419’s fully loaded CZ 457 MTR comes complete with an ARCAlock rail, AREA 419 scope base, and Area 419 bolt knob. This is certainly a top choice for a sub-$1000, .22 LR PRS cross-trainer. Buy now and save $170.00.
12. Creedmoor Sports — $10 Off $150+ Orders and Ammo Sale
On Cyber Monday, Creedmoor Sports is offering $10 Off all orders over $150.00, with FREE Shipping. In addition, Creedmoor Sports has discounted its excellent 75gr .223 Rem Ammo. Get 50 rounds for just $30.00. That’s a 32.5% discount off the regular $39.75 price.
We bet most readers own at least one 9mm handgun. Here’s a killer deal on major-brand 9x19mm FMJ ammo — which is fine for general range use and training. The $8.49 price for 50 rounds works out to just seventeen cents ($0.17) per round. At that rate it’s not worth hand-loading, if you value your time at all. Act soon, this deal may expire on 12/2/2019 at 11:59 pm.
14. Palmetto State Armory — Taurus G2c 9mm Pistol, $179.99
This is a good little compact carry gun at a great price. Palmetto State Armory has the black-on-black Taurus 9mm G2c for just $179.99. But it gets even better — with Taurus Factory Rebate your net cost is just $154.99! That’s one of the lowest prices we’ve ever seen for a big name, reliable 9mm handgun. Buy soon before the Rebate Offer expires.
15. Amazon — Jialitte Scope Bubble Level, $10.99
All serious rifle shooters need a scope level. This nicely designed Jialitte Scope Bubble Level features a 30mm milled inside diameter, plus an inner insert ring so it will also fit 1″-diameter main tubes — that dual-diameter versatility is a nice feature. We also like the way the unit is nicely radiused, and has a low profile in the middle. Price is just $10.99 with free shipping. User reviews have been very positive. You could easily pay $35.00 or more for a 30mm scope level.
Do you own a black rifle? Looking to get a good supply of quality ammo and magazines for your AR? Or maybe you want to add an AR to your arsenal before the gun grabbers pass more restrictive legislation? Here are two great pre-Black Friday Deals at Palmetto State Armory. Get a complete AR Lower for just $129.95. Add an AR Upper for just $219.99. And then stock up on mags and ammo with equally awesome deals. For just $359.99 you can get 1000 rounds of Federal American Eagle 5.56 ammo plus TEN (10) Magpul 30-rd mags. AMMO and MAGs Deal HERE.
PSA Complete Lower and Upper at Huge Discounts
Right now you can get a complete PSA Lower with Flat Dark Earth grip and stock, for just $129.99. That’s a steal. If you need an AR Upper you can get a basic 16″ Upper with FDE handguard, Picatinny scope rail, and 1:7″ twist barrel. These components have both earned five stars from scores of actual PSA buyers.
Great Package Deal on Federal Ammo and Magpul Magazines
This Federal ammo is quality, American Eagle 5.56mm 55 Grain XM193BK FMJBT Ammunition packed in a bulk box. So all 1000 rounds is in one big box. XM193 product is first-quality product manufactured at the Army’s Lake City Ammunition Plant for Federal Cartridge. NOTE: All XM193 product is the same regardless of the sku or part number. The only difference is the package configuration.
The PMAG 30 is a 30-round 5.56×45 NATO (.223 Remington) AR15/M4 compatible magazine that offers a cost competitive upgrade from the aluminum USGI. Easy to load and dissasemble, the PMAG features rugged polymer construction, flared floorplate for positive mag extraction, stainless steel spring, and an anti-tilt, self-lubricating follower for increased reliability.
At the request of our readers, we provide select “Deals of the Week”. Every Sunday afternoon or Monday morning we offer our Best Bargain selections. Here are some of the best deals on firearms, hardware, reloading components, optics, and shooting accessories. Be aware that sale prices are subject to change, and once clearance inventory is sold, it’s gone for good. You snooze you lose.
1. LongShot Cameras (TargetVision) — CyberSale Save Up to $100
Longshot Cameras (aka TargetVision) makes the best long-range target camera systems on the market. These deliver sharp, clear images from impressive distances. View on your mobile device. You can even mark/score your shots with Longshot’s mobile Apps. Right now you can save on ALL LongShot Camera products. The superb LongShot LR-3 2-mile UHD (Ultra-High-Definition) is now just $699.00 on sale, while the 300-yard UHD Marksman is on sale for $349.00. The new Hawk Spotting Scope camera is a steal at $249.00, marked down from $299.00. Act soon — these deals expire 12/2/2019.
2. Powder Valley — Free HazMat Starting 11/29/19 — All Brands
Need powder and/or primers? Then head over to Powder Valley. Starting November 29, 2019 (this coming Friday), you can get FREE HazMat for all brands of reloading powder and primer. And yes you can combine powder and primers in the same shipment. This great FREE HazMat offer runs through December 2, 2019. Go to PowderValleyInc.com and select FREE HazMat during checkout, starting Friday November 29th.
3. EuroOptic.com — HUGE Nikon Scope Close-Out Sale
Nikon is getting out of the riflescope business. Nikon will continue to make spotting scopes, binoculars, and rangefinders — but no more riflescopes. That means HUGE close-out savings! EuroOptic.com is running a close-out sale on Nikon riflescopes. This sale includes the excellent Black FX1000 (FFP), and Black X1000 (SFP) tactical scopes. If you are looking for a great tactical or hunting scope at a crazy low price, head over to EuroOptic this week. For example the 4-16x50mm FX1000 MRAD is marked down from $749.95 to just $369.95, a 50% savings!
4. XLR Industries — Chassis System Discounts, $50-$300
If you’re a fan of modular chassis systems, here’s a great early Black Friday Sale. Starting today 11/27/19, XLR Industries is offering huge discounts on their modern metal/composite chassis systems, which are made for Remington, Savage, Howa, and Tikka actions both right- and left-hand. Use these Discount Codes to save up to $300 on a purchase: BLK300 ($1000+ order); BLK200 ($750-$999 order); BLK150 ($595-$749 order); BLK50 ($250-$594 order).
5. Midsouth — New .308 Win Lake City Brass, $79.99/250 cases
Midsouth Shooters has acquired a large quantity of excellent Lake City 7.62×51 (.308 Win) Primed Brass. NOTE, this is New Brass that has never been fired. However it is described as “pull-down”, meaning the brass had originally been assembled into loaded ammo. The brass comes PRIMED with CCI #34 primers, with crimped primer pockets. The brass is sold in 250-count bags for $79.99. That works out to just $0.32 per case — a great deal for primed, strong Lake City Brass. This is good stuff for M1As and hunting rifles.
6. Midsouth — Tipton Best Gun Vise 2, $78.99
Midsouth has the Tipton Best Gun Vise 2 for just $78.99, a fine deal on a versatile, highly adaptable unit. An Amazon #1 Best Seller, this deluxe gun vise has earned much praise from owners. Or if you want something more basic that’s easier to move around, check out the Tipton Cleaning Gun Vise for $45.99 from Midsouth — a very attractive price. Either way you can’t go wrong.
7. Grizzly Industrial — Bald Eagle Slingshot Rest, $129.97
Maybe you’re just getting into F-Class or just need a good stable front rest to shoot from and don’t want to spend a ton of money on one. Don’t worry because Grizzly now has the Bald Eagle BE1129 aluminum slingshot rest for an amazingly low $129.97 close-out price. Just add your favorite front bag and you’re ready to go with a competition quality elevation adjustable rest. They also have the Bald Eagle BE1209 – Big Fifty Rest on sale now for $176.97 close-out price. With a much wider span and cast-iron legs, the Big Fifty is designed for larger guns up to .50 caliber. Either way, these rests are a great value.
8. Amazon — MTM AC4C Ammo Crate with 4 Ammo Boxes, $22.99
Here’s a very cool product from MTM at a great price. The versatile MTM AC4C Ammo Carrier features four, lockable polymer ammo cans in a fitted, four-slot 23.5″ x 11.3″ x 7.5″ carry crate. This makes it easy to haul four full ammo cans. Actual purchasers have raved: “Moments after I received this storage box set I ordered another. Very well built and great design. Awesome and a steal at the price.” Right now this is on sale at Amazon for just $22.99 with free shipping on orders over $25. The system includes four lockable, O-Ring 11.3″ x 7.2″ x 5″ ammo cans (AC30T) for multi-caliber ammo storage. The crate even includes tie-down points for transport in a cart or ATV. NOTE: Last year this MTM AC4C system sold for $39.99. The current $22.99 price represents a 43% savings! Our Deals Editor recently ordered this himself and he liked it so much he immediately ordered another AC4C kit.
9. Amazon — Tactical Eyewear Kit, $15.99
Wearing eye protection should be second nature for anyone around firearms for so many obvious reasons. Whether for you, a backup or to have for those shooting with you grab a set of XAegis Tactical Eyewear Kit that come complete with 3 different lenses and protective case. You can easily switch from Gray, to Yellow, to Clear lenses, popping them into the frame. This 3-Lens shooting Kit is an Amazon #1 Best Seller.
You’d like to protect your hearing, and maybe you’re a little curious about how your rifle might shoot suppressed. So you’re thinking of buying a suppressor (aka “can”, “moderator”, “silencer”). You can’t just get one off the shelf at Walmart. Acquiring a suppressor requires filling out paperwork and paying a Federal $200 Tax Stamp. Plus there is typically a pretty long wait. However, the good news is that suppressor ownership is now legal in 42 of the 50 American states — that’s 84%! For most American adults, getting a suppressor is legal, provided pass the required background checks.
States Where Suppressor Ownership is Allowed
Currently, the following 42 states allow private ownership of suppressors: AL, AK, AZ, AR, CO, CT, FL, GA, ID, IN, IA, KS, KY, LA, ME, MD, MI, MN, MS, MO, MT, NE, NV, NH, NM, NC, ND, OH, OK, OR, PA, SC, SD, TN, TX, UT, VT, VA, WA, WV, WI, WY.
Note: Even if you live in one of the states listed, you should still verify that owning a suppressor is legal in your area. Some states may have municipal- or county-based restrictions.
States Where Suppressor Ownership is Prohibited
Unfortunately, there are still eight (8) States that forbid private ownership of suppressors. The eight No-Go States are: California, Delaware, Hawaii, Illinois, Massachusetts, New Jersey, New York, Rhode Island. In these eight states, private ownership of suppressors (aka “silencers”) is forbidden. Hopefully that a few of those eight hold-out states will change their laws in the months ahead.
Looking Inside a Suppressor in Action
Popular YouTube Channel Smarter Every Day recently released a cool video featuring rifle suppressors with see-through acrylic sleeves. The team filmed shots through the suppressors using ultra-high-speed (110,000 frame per second) cameras. When played back in super-slow-motion, you can see the flame propagate through the suppressor and the bullet move through each baffle before it exists the muzzle. Watch the results in the video below — it’s mesmerizing:
See Through Suppressor in Super Slow Motion (110,000 fps) — Click Arrow to Watch:
Suppressors, On Average, Reduce Noise Levels about 30 Decibels
In an article for Ammoland, gunwriter Sam Hoober says that you can expect about 30 decibels (dB) of noise reduction from the average suppressor: “Looking at a few different products, SilencerCo attests their suppressors reduce the sound pressure of a 9mm gunshot to anywhere from 125.7 dB to 131.5 dB, depending on the model. Advanced Armament Co, another popular supplier, attests a 23 dB to 33 dB reduction or down to 127 dB. Liberty Suppressors, another manufacturer, attests a reduction of 24 dB to 38 dB, depending on model and other factors. In short, we can presume something on the order of 30 dB of attenuation as an average.”
Using that 30 dB number you can quickly discern that you’ll still need hearing protection — good hearing protection — when shooting any suppressed firearm (even a .22 LR). “Spikes of 130 dB and more can result in permanent hearing damage instantly”. Source: NRA Blog.
Story idea by Boyd Allen. We welcome reader submissions.
Former Army Ranger sniper instructor Ryan Cleckner is the author of the best-selling Long Range Shooting Handbook. Cleckner hosts a series of videos that cover shooting techniques appropriate for tactical and PRS-type disciplines. Here are five short videos that cover various aspects of shooting techniques and rifle set-up. We think PRS/NRL competitors (and long-range hunters) can benefit from these videos.
“Consistency is the key to accuracy.
You need to think about a system of how you’re going to shoot that is not only comfortable, but [is] repeatable when you’re shooting.” — Ryan Cleckner
In this first video, Cleckner explains proper scope position. Ryan finds that some shooters place the scope too far forward or too far rearward. If the scope is too far back you may have issues with eye relief and stock reach to shoulder. If it is too far forward, you may have cheek-weld problems or get neck strain.
Cleckner offers a simple method to check your scope position: “To see if your scope is set up properly … close your eyes, lay your head on your gun, get completely comfortable, and only when you are set-up, then open your eyes. If you can’t see clearly through your scope, CHANGE something [such as comb height or scope position]”. “When you open your eyes, if you see some scope shadow [i.e. the black ring around the edge of the scope picture], figure out which way you need to move your head to get rid of that shadow, and then make adjustments to either your position, the rifle, or the scope.”
Cleckner prefers shooting off a bag when in the prone position, when that is practical. The bag provides a more stable support than a small Harris-type bipod, doesn’t require pre-loading the rifle, and there is less bounce or hop on recoil.
Former Army Ranger sniper team leader Ryan Cleckner explains how important it is to keep your rifle straight up and down when long-range precision shooting. Cleckner demonstrates with an AR-10 modern sporting rifle how slight cant to your rifle can cause a miss over long distances.
Here Cleckner covers some of the basic points of trigger control on tactical-style rifles. These basic principles apply to both single-stage and two-stage triggers. NOTE: For benchrest rigs, with ultra-light pull weights, more refined techniques may be appropriate.
In tactical events, when you’re shooting on the clock and loading from a detachable magazine, you should manipulate the bolt smoothly but strongly. Here Cleckner demonstrates how to cycle a tactical-type rifle. He says, “You should be running the bolt on your rifle with authority. Run it like you mean it!” NOTE: Completely different techniques are appropriate for custom benchrest rifles that manually feed.
Long Range Shooting Handbook — A Good Resource
Cleckner’s Long Range Shooting Handbook covers a wide range of topics important for precision marksmanship — both shooting skills and technical matters. You can view Sample Chapters from Ryan’s Book on Amazon.com. Cleckner’s book is designed as an intro to key concepts such as MOA vs. Mils, External Ballistics, and Environmental Effects. Included are personal tips and advice based on Cleckner’s years of experience as a sniper instructor and special operations sniper.
The Long Range Shooting Handbook is divided into three main categories: What It Is/How It Works, Fundamentals, and How to Use It. “What It Is/How It Works” covers equipment, terminology, and basic principles. “Fundamentals” covers the theory of long range shooting. “How to Use It” gives practical advice on implementing what you’ve learned, so you can progress as a skilled, long range shooter.
A hot new 6mm match bullet has arrived — the impressive Berger 109-grain Hybrid. This new 109-grainer, officially called the Long Range Hybrid Target (LRHT), features a formed meplat (bullet tip) for more consistent Ballistic Coefficient (BC). Berger tells us that the new 109gr LRHT boasts a high-BC, “jump-tolerant” hybrid ogive profile along with an extremely consistent BC. In fact, Doppler Radar testing confirms less than 1% BC variation from bullet to bullet. While a high BC is of course desirable for competitive shooting, shot-to-shot BC consistency is most critical when engaging targets to 600 yards and beyond. The 109’s BC numbers are very impressive for a 6mm bullet: 0.568 G1 and 0.292 G7.
AccurateShooter.com plans to test these new 109s very soon — we’re getting them into the hands of some championship-level shooters. The new 109s should prove very popular. These bullets are optimized for leading accuracy cartridges such as 6mm Creedmoor, 6mmBR, 6BRA, 6mm Dasher, 6BRX, 6GT, 6XC, and 6×47 Lapua among others. NOTE: Berger states that the new 109gr LRHT offers the same stability factor as Berger’s outstanding 105gr Hybrid Target. Accordingly, the new 109 can be considered a “direct replacement” for the 105s. And YES, the 109gr LRHT will work in 1:8″-twist barrels.
“The 6mm 109 offers several advantages,” said Bryan Litz, Berger’s Chief Ballistician. “Its ultra-sleek profile provides a higher Ballistic Coefficient (BC) resulting in less wind drift at all ranges. Using the proprietary MRT technology also results in a higher and more consistent BC, which is important for reducing dispersion at long range.”
Meplat Reduction Technology for More Consistent BCs
Berger’s new 6mm 109-grain Long Range Hybrid Target™ Bullets is designed to provide Benchrest, F-Class, and PRS enthusiasts a class-leading level of precision and consistency. Utilizing advanced/proprietary manufacturing processes, Berger’s Meplat Reduction Technology™ (MRT™) System applies controlled pressure along the projectile nose, producing a homogeneous and repeatable bullet profile. This yields what Berger claims are “the industry’s most consistent Ballistic Coefficients (BC)”.
The Berger 6mm 109 Grain Long Range Hybrid Target™ Bullets will be available very soon at authorized Berger Retailers. Use the Berger Dealer Locator to find a store near you.
Are you looking for a muzzle brake for your rifle? Then you MUST check out the epic Muzzle Brake Test performed a few seasons back by PrecisionRifleBlog.com. This massive, data-driven field test was organized by PRB head honcho Cal Zant. Over a period of months, Cal and his team tested 20+ muzzle brakes designed for 6mm, 6.5mm, and .30-caliber precision rifles. Hundreds of hours went into this research, which provided vital new insight and empirical data for several aspects of muzzle devices. Cal put a huge amount of labor/engineering into these tests and his findings deserve to be widely read.
The Muzzle Brake Overview Article covers designs, specs, and prices of 20+ brakes. Then separate, detailed PRB articles cover sound levels, recoil reduction results, ability to stay on target, muzzle blast/ground effects and more. SEE PRB Muzzle Brake Test Results SUMMARY.
Recoil Reduction
Cal created a system to directly measure the entire recoil force signature of each muzzle brake using high-speed sensors. Although the recoil cycle happens very quickly (around 1/100th of a second), his test equipment could record up to 1,000 force data points during a single recoil cycle! He fired over 1,000 rounds of match-grade ammo through four different rifles: 6XC, 6.5 Creedmoor, .308 Win, and the monster .300 Norma Magnum. He literally spent thousands of dollars on this part of the test, to ensure he got it right.
Cartridge Types Tested: 6XC, 6.5 Creedmoor, .308 Win, and .300 Norma Magnum
Ability To Stay On Target
David Tubb helped Cal develop this part of the test, because David believes this is the most important aspect of a muzzle brake. Using a laser and high-speed camera, Cal was able to objectively quantify how well each design helped you stay on target.
Noise Level
Muzzle brakes are loud, but some are louder than others … three to four times as loud. Cal enlisted the help of an expert from the suppressor industry to precisely measure how much louder each muzzle brake made a rifle. Each brake was tested in accordance with MIL-STD-1474D using calibrated military-approved equipment, and the noise level was also tested at the shooter’s position.
Recoil Reduction Summaries by Caliber
In the detailed summaries of recoil reduction test results, PRB provides hard data that might surprise a few people and even dispel a few myths. Particularly interesting is Zant’s comparison of recoil reduction with a suppressor compared to muzzle brakes. How do you think the suppressor performed compared to the brakes? You may be surprised.
5. Gas Block: You want a gas block that does not impose pointed stress on the barrel. Clamp-on types that grab all the way around the barrel are excellent. The blocks that are pinned on with tapered pins that wedge against the barrel or the slip on type of block with set screws that push up from underneath (or directly on the barrel) can deform the bore inside of the barrel and can wreck the accuracy of an otherwise great barrel.
