In June 2020, Hornady introduced the 6mm ARC, a new SAAMI cartridge optimized for AR-platform rifles*. The new 6mm ARC is basically a 6.5 Grendel necked down to 6mm, with the shoulder moved back around .030″. That pushed-back shoulder does reduce case capacity (and velocity), but we assume Hornady did that to create a shorter, proprietary chamber so people could not simply neck-down Lapua 6.5 Grendel brass, as has been done for years with Robert Whitley’s outstanding 6mm AR wildcat.
What Is the 6mm ARC Cartridge? The 6mm ARC cartridge is a new SAAMI-spec cartridge based on the 6.5 Grendel case necked down for 6mm bullets, with the shoulder moved back 0.030. Yes it is designed to run in AR15-platform rifles. You’ll need a new barrel, bolt, and mags. If you already have an AR chambered in 6.5 Grendel, the ONLY thing you need to change is the barrel. Everything else — bolt, magazines, gas system – is compatible with 6mm ARC.
▶ Official SAAMI Cartridge (not wildcat)
▶ Fits standard AR15-platform rifles
▶ Fits Short/Mini action bolt rifles
▶ Efficient short, fat case design
▶ 30-degree case shoulder
What Do I Need To Shoot the 6mm ARC?
Faxon and Ballistic Advantage are already producing barrels, with more manufacturers sure to follow. All the other required components are already on the market for 6.5 Grendel rifles. Aero Precision already offers complete 6mm ARC uppers.
If you’re converting a standard 5.56×45 mm (.223 Rem) AR15 upper to shoot 6mm ARC, you’ll need a 6mm barrel, a Type II 6.5 Grendel bolt carrier group, and new magazines. Some folks have suggested standard AR mags will work, but trust us, you want the magazines that have been designed for 6.5 Grendel. Most of the hardware you need is available at Brownells.
* While 6-6.5 Grendel shooters are known to run stout pressures, the new 6mm ARC cartridge has a relatively moderate Maximum Average Pressure (MAP) rating of 52,000 psi according to the official SAAMI specifications. For a variety of reasons, is wise to keep pressures in a semi-auto rifle moderate. Don’t chase the velocities you might get in a bolt-action gun.
Christmas is just a week away, so today we’re featuring a hand-picked collection of sixteen “stocking stuffers” for precision shooters. Some of these are recent inventions. All are handy items that you’ll use over and over again at the range, on your vehicle, and/or at your loading bench (so you’re allowed to buy them for yourself, even after Christmas).
B&T Industries BT62 Determinator — $7.95 ✔
The acrylic BT62 Determinator measures groups with laser-cut concentric measuring rings. Check group size quick and easy — simply place the Determinator over shot group. Adjust until one of the circles crosses the center of the two outer-most holes. That gives you the center to center group measurement (1.5″ maximum). Alternatively, you can measure edge to edge (of the farthest shots) and then subtract the bullet diameter. Cool tool for gun guys. The supplied lanyard also glows in the dark.
MAXUS Reloading Scale Kit — $16.99 ✔
Here is a VERY affordable compact scale for use at home or at the range (with battery power). Though it costs under $20, the MAXUS Digital Milligram Scale (#ad) has earned good reviews and should be precise and repeatable. This high-precision digital milligram scale set comes with calibration weight and other reloading accessories. And numbers are easy to read with its large backlit LCD display. NOTE: This MAXUS Scale has dual power functionality — it can run with batteries or USB cable. It can read grains, ounces, grams, and other weight types.
Lyman Powder Scale Pan and Case Funnel — $6.99 ✔
The Lyman Powder Pan/Funnel saves reloaders time by combining the powder-receiving pan and funnel into one unit. With this combo tool reloaders can pour powder directly into the case without having to fumble with a separate funnel. That’s smart and efficient and just $6.99 on Amazon (#ad). RCBS makes a similar powder pan/funnel ($13.99 on Amazon #ad) with a slightly different case-neck section. You may want to try both to determine which works best for your cartridge brass.
Surveyor’s Flagging Tape (for Wind Indicators) — $1.69 per Roll ✔
Allen Camouflage/Black Neoprene Scope Cover — $11.47 ✔
Here’s a great gift item for a hunter. This reversible Camo-pattern Neoprene Scope Cover fits scopes up to 15″ long and 56mm lens diameter. The cover cushions your scope and protects against moisture and scratches. Along with the $11.47 large version, Allen makes a 12″ medium camo scope cover, and a 10″ small version. NOTE: These covers are reversible with Mossy Oak Break-Up Country camo on one side (as show), and black on the other side.
SIG Sauer Foxtrot1X LED Lamp — $49.99 ✔
The SIG Sauer FOXTROT1X gun lamp works with Picatinny rails, SIG Sauer rails, and Glock rails without the need for adapters or modifications. It features dual, finger-actuated switches that allow for ambidextrous operation in both continuous and momentary modes. This $49.99 gun lamp features an efficient 450 lumens white LED that can run for 1.5 hours on a single CR123 battery. This rail-mounted light is compatible with most holsters designed for light-equipped handguns.
MagnetoSpeed RifleKuhl Barrel Cooling Fan — $60.00 ✔
Cooling your barrel with a compact fan can extend barrel life. This bright red RifleKuhl from Magnetospeed (#ad) is quite effective. The battery-powered impeller pushes cooling air down the barrel. It has a chamber seal for increased cooling efficiency while a neodymium magnet helps secure the device to your action. The RifleKuhl includes a belt/pocket clip and there is a Replaceable built-in 50 Micron air filter. The RifleKuhl costs $60.00 on Amazon.
Ludex Case Prep Multi-Tool with Internal Storage — $15.99 ✔
This handy Ludex Case Prep Multi-Tool can perform multiple tasks. On one end is an inside neck chamferer, with the outside chamferer/deburrer on the opposite end. Stored inside the tool are four (4) uniforming attachments for large and small primer pockets. This tool with all the attachments is $15.99 on Amazon.
Digital Display Timer with Big Buttons — $16.95 ✔
If you shoot in a discipline with time limits, or you time your firing strings during practice, having a reliable and easy-to-read timer is critical. We like this very affordable Digital Display Timer with both count-up and count-down functions. Just $16.95 on Amazon, this unit boasts an easy-to-read display and LARGE buttons making it perfect for F-Class, Palma, and other matches. This timer comes with both a built-in stand AND a strong magnet so you can position the timer conveniently.
This handsome red leather ammo holder secures twenty (20) rounds of .308 Win-size ammunition, in a handy plastic carrier. In addition there are loops for 2 more sighter rounds on the outside. This is a very nice gift for a target shooter or hunter. There is also a .223 Rem version in black leather. Both these leather ammo holders conveniently fit into a shooting coat pocket via a leather pocket flap.
Hoppes Pistol Cleaning Kit — $8.99 ✔
Right now, for just $8.99, you can get a nice Hoppes Pistol Cleaning Kit complete with solvents, cleaning rod with swivel handle, jags, patch holder, bore brush, and 50 patches. The fluids include 2 oz. of Hoppe’s No. 9 Cleaning Solvent, plus 2.25 ounces of Hoppe’s Lubricating Oil.
Wheeler Manual Trigger Pull Scale — $17.90 ✔
While we prefer a sensitive digital trigger pull gauge, it’s nice to have a manual back-up. And the Wheeler gauge is plenty accurate for pistols and most hunting rifles. The Wheeler trigger pull scale accurately measures trigger pull weight from 8 ounces to 8 pounds. It features an ergonomic handle for consistent direction of pull. The sliding indicator stays reliably on the maximum weight registered and high contrast pull weight increment marks are very easy to read. This spring-type trigger scale measures in 2-ounce increments and is accurate to +/- 2 ounces — plenty good for pistols and hunting rifles. Priced at just $17.90 on Amazon, this gauge has earned 91% four- or five-star owner reviews.
Sack-Ups 13.5″ Pistol Storage Sock — $8.49 ✔
Here’s an actual fabric sock that you can roll up and put in your Christmas stocking. Sack-Up knitted storage sacks are made from silicone-treated 100% natural cotton. The cotton’s wicking ability draws moisture off the gun, inhibiting corrosion. This $8.49 13.5″ Sack-Ups sock is a great choice for revolvers and metal-framed pistols. Midsouth also carries larger 36″, 42″, and 52″ Sack-Ups for shotguns and rifles.
With the shortages of powder and primers, many folks will be shooting more rimfire in 2021. While .22 LR rimfire rifles require less cleaning compared to centerfire rifles, you still need to maintain those rimfire barrels. We like Bore Tech’s Rimfire Blend Bore Cleaner, now $16.15 at Creedmoor Sports. This specially-formulated, ammonia-free bore cleaner can simultaneously cut through the layers of lead, wax, and carbon fouling. NOTE: After use you may have to shoot quite a few rounds before best accuracy returns.
Is the temp and humidity OK inside your gunsafe? With Hornady’s Govee Bluetooth Wireless Hygrometer Thermometer, you can check that easily. The unit measures temperature and humidity inside your safe, and then displays temp/humidity readings on your smartphone via a Bluetooth App. The unit has a good range in open rooms but you may have to get close to the safe to get a signal with the safe door closed. The sophisticated Govee Wireless Hygrometer Thermometer is now just $14.99 on Amazon (#ad).
BONUS — TACTICAL XMAS STOCKINGS, $15.99-$17.99 ✔
Don’t have a stocking to hold your small gift items? Then check out these cool, heavy-duty stockings. These Willbond Tactical Stockings are sold as a two-pack for just $14.99 – $17.99 on Amazon (#ad).Choose a pair in three different types: Classic Style (Camo and Black, $14.99); Bright Style (Bronze and Green, $15.99), and Stylish Style (Green and Black, $17.99). These Willbond Tactical Stockings feature Hanging hook, MOLLE straps, carry handle, outside draw pocket, side zipper, and Velcro USA Flag Patch. These stockings are sure to bring smiles to your tacticool family members and friends.
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Conventional brass jags work great — except for one thing. They can react to solvents, leaving a blue “false positive” on patches. In recent years, jag-makers have experimented with many different materials in an effort to cure the solvent-reaction problem. Today we have polymer jags, nickel-plated jags, and stainless steel jags. And the latest innovation is the aluminum jag from Dewey.
J. Dewey Mfg. offers a series of “Copper Eliminator” jags and brush adapters made from aircraft-grade aluminum with the same hardness as brass. Dewey claims that its aluminum jags will not become embedded with grit or particles that could harm your bore. At the same time, Dewey’s aluminum jags will not react to ammoniated bore solvents that can turn patches blue green when used with brass jags. Dewey aluminum jags are offered with either male OR female 8/32 threads. The $5.25 aluminum jags and $3.70 brush adapters are offered in a wide variety of calibers. You can order these products from Dewey Mfg. or Brownells.
Story Tip from Boyd Allen. We welcome submissions from our readers.
A while back, Shooting Times released an article entitled “Ten Most Common Reloading Mistakes”. Listed below are the Top Ten mistakes hand-loaders can make, at least according to Shooting Times. What do you think of this list — does it overlook some important items?
Top Ten Reloading Mistakes According to Shooting Times:
1. Cracked Cases — Reloaders need to inspect brass and cull cases with cracks.
2. Dented Cases — Dents or divets can be caused by excess case lube.
3. Excessive Powder Charge — Overcharges (even with the correct powder) can be very dangerous.
4. Primers Not Seated Deep Enough — “High” primers can cause functioning issues.
5. Crushed Primers — Some priming devices can deform primers when seating.
6. Excess Brass Length — Over time, cases stretch. Cases need to be trimmed and sized.
7. Bullets Seated Too Far Out — If the bullet is seated too long you may not even be able to chamber the round. Also, with hunting rounds, bullets should not engage the rifling.
8. Burrs on Case Mouths — Ragged edges on case mouths can actually shave bullet jackets.
9. Excess Crimp — This is a common problem with pistol rounds loaded on progressives. If case lengths are not uniform some cases will get too much crimp, others too little.
10. Inadequate Crimp — This can be an issue with magnum pistol cartridges in revolvers.
Do you agree with this list? We think some important things are missing, such as not adjusting full-length sizing dies properly. This can cause the shoulder to be pushed back too far (or not far enough). Another common mistake is using brass that is worn out, i.e. stretched in the case-head area from multiple cycles of hot loads. We also think the #1 error a reloader can make is using the wrong powder altogether. That can be a fatal mistake. See what happens when you load pistol powder in a rifle.
NSSF, the Firearm Industry Trade Association, has launched a big auction with over 30 items up for bid — from one-of-a-kind firearms to exclusive hunting and shooting experiences. Running through January 24, 2025 at NSSF.org/auction, this Celebration of Freedom Auction features more than 30 items ranging from a 7-day dream safari in Africa to collectible firearms from respected gunmakers including Smith & Wesson, Colt, Browning, SIG Sauer, and Ruger. Place BIDS at NSSF.org/auction.
Anyone can bid on more than 30 bucket list items within the auction. Bids are open now through the final day of SHOT Show on January 24. All proceeds from the auction will support future NSSF #GUNVOTE voter registration, education, and get-out-the-vote campaigns aimed at protecting gun rights.
Below are a partial sample of the products being auctioned. There are over 30 items up for auction, including packages of multiple products.
NOTE: Many of these auction items have high level starting bids set in place. For example the Ultimate Outback Elk Hunt has a $12,500 starting bid, and a Leupold Premium Optics Package has a $2500 starting bid. However, there ARE some affordable firearms up to bid such as a Ruger 10/22 Target and a nice Colt CBX precision rifle paired with Colt 44 magnum revolver (current bid $1800.00 for both).
Each day, on Facebook, the NRA National Firearms Museum showcases something special from the Museum collections. A while back the Museum displayed a trio of snakes — three very special Colt Pythons. From bottom to top, these three prized wheelguns are: Colt Python serial number 2, number 3, and number 5. And yes, that is the original box for Python #2 (at bottom). The museum says such low serial number guns were typically produced for a company executive or key members of the gun design team.
Loved for their beautiful finish, nice balance, and great trigger, Colt Pythons have proven to be excellent investments. Since the Colt Python was first introduced in 1955, Python prices have gone through the roof. A pristine, LNIB early-era Colt Python can now command $4400.00 or more, more than 35 times the original price.
How much did a Python cost in 1955? You could purchase the handsome Royal Blue model for just $125.00! Factory-engraved models started at $245.00, according to this Colt advertisement from June, 1955:
History and Design Evolution of Colt Python Revolvers
You can see hundreds of other interesting firearms on the National Firearm Museum website, www.NRAMuseum.com. Or, if you’re lucky, you can see the collections in person. The NRA now operates three Museum locations: the NRA National Firearms Museum in Fairfax, Virginia; the NRA National Sporting Arms Museum in Springfield, MO; and the Frank Brownell Museum of the Southwest in Raton, NM.
This 50 Cal Days of Christmas video features some fantastic slow-motion footage of a Barrett .50 Caliber M82. This bad boy pumps out some serious muzzle flash. Watch carefully at the 1:05 mark and you can see the .50-caliber projectile exit the muzzle brake and spin through the ball of smoke and flame. For best viewing, you may want to change your video settings to 720p or 1080p High Definition and view full-screen (using the video controls).
The video carries “overkill” to the max, as the shooter uses his big Barrett to blast Christmas ornaments and a snow-globe. To top things off, at the 2:50 mark, the shooter fires the .50 cal at a pyro-equipped gingerbread house. (The gingerbread shot is taken from a standing hold no less!) The results (at 3:22) are impressive — gingerbread house becomes flaming gingerbread pudding.
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.
NOTE: All listed products are for sale to persons 18 years of age or older. No products are intended for use by minors.
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1. CDNN Sports — Winchester XPR with Vortex Scope, $499.99
⏺️ Super deal on Winchester hunting rifle with Vortex 3-9x40mm scope
Here’s a great deal on a hunting rifle. For just $549.99, you can get a quality Winchester XPR rifle with Vortex Crossfire II 3-9x40mm with BDC reticle. Plus the current $50 Winchester Holiday rebate lowers your net cost to just $499.99! For this rifle + optic special, there are five (5) chambering choices: 6.5 Creedmoor, 7mm Magnum, .300 WSM (regular and compact), .300 WinMag, .338 WinMag. These rifles feature a 20″, 22″, or 26″ barrel, Perma-Coat steel receiver, free-floating button-rifled barrel, MOA trigger system, and black composite stock.
2. Sportsman’s WH — December Deals of the Day
⏺️ Huge savings on AR-15 lowers, uppers, complete rifles
This month Sportsman’s Warehouse has been offering Deals of the Day with great bargains. Save on Rifles, Pistols, Shotguns, Optics, Camping Gear, Outdoor Clothing, GPS units and more. Every day now through December 24, 2024 2-4 new deals are revealed. Plus the previous deals remain valid through Christmas — so all the December Daily Deals are still available. For example you can still get the Day 6 Deal: SAR 9mm pistol for just $249.99 ($50 off). Enjoy these bargains!
3. Palmetto SA — AR-15 Days of Christmas Deals
⏺️ Huge savings on AR-15 lowers, uppers, complete rifles
There are some amazing bargains at Palmetto State Armory this month. Right now you can get a complete Classic AR-15 lower for just $99.00 — yes that includes full trigger assembly and buttstock. Or get a FDE M4 AR-15 16″ barrel Carbine, complete and ready-to-shoot, for just $499.99. You’ll find these and hundreds of other bargains on PSA’s Holiday Deals Page aka AR-15 Days of Christmas.
⏺️ Great price for everything you need — press, powder measure, scale etc.
For folks getting started with hand-loading, a great basic package is the RCBS Rebel Master Reloading Kit. On sale for $369.99 at Midsouth this RCBS Package features pretty much all you need to load rifle and pistol ammo: Rebel single-stage Press, Uniflow-III Powder Measure, 1500gr digital scale, hand priming tool, powder funnel, powder trickler, hex key set, accessory handle with case neck brushes, primer pocket brushes, deburring tool, loading block, and case lube. You even get a Speer Reloading Manual. Through December 31, 2024, this Rebel Master Kit qualifies for a $75 RCBS Buy Green, Get Green Rebate. That lowers your net cost to just $294.99 — making this an amazing deal.
⏺️ Fast, programmable, accurate dispenser at great price
The Frankford Arsenal Intellidropper (#ad) is a high-quality powder scale/dispenser. It’s accurate to +/- one-tenth of a grain, dispenses in seconds, and can be controlled by a handy mobile App that stores charge weights for different cartridges. This unit has a 7000-grain capacity with both auto and manual trickle capability. This $159.99 price is an incredible deal — save $70 off the $230 price charged elsewhere.
7. Graf & Sons — Free HazMat with $150 purchase
⏺️ Get FREE HazMat with purchase of in-stock powder and/or primers
How’d you like to save about $25 on your next powder and/or primers purchase? Well Graf’s is running a FREE Hazmat promotion now through 12/19/24 at midnight central time. That’s a nice bonus. Graf & Sons has a good selection of popular powders in stock now including top choices from Hodgdon, Alliant, Vihtavuori, and Accurate. Plus there are Federal, CCI, Rem, Winchester, Fiocchi and other primers in stock.
8. Amazon — Tipton Gun Vise with Adjustable Cradle, $39.99
⏺️ Good, rugged, stable gun vise great for maintenance tasks
Having a stable platform to hold your rifles is critical for cleaning, mounting optics, and general maintenance. The Tipton Gun Vise (#ad) is a rugged, versatile rifle support that fits various fore-end types, with compartments to organize your screws, jags, and brushes. This Tipton Gun Vise is now ON SALE for just $39.99 on Amazon — a great deal as this product sells for $54.99 elsewhere. This is a tough, versatile unit that works well for many tasks: cleaning barrels, stock refinishing/bedding, scope mounting, trigger adjusting, bore-scoping barrels, and checking throat length with a Hornady OAL tool.
9. MidwayUSA — Tipton Jag Sets Brass or Nickel-Plated 24% Off
⏺️ Very useful kit with 13 different size jags
If you shoot a variety of calibers, you need one of these Jag Kits, now 25% Off. You get 13 different diameter jags in a fitted case for under $15.00. That’s a steal. We like the Nickel-Plated Ultra Brass Jags (24% off price $15.99) because you don’t get “false positive” blue from your solvent interacting with the jag itself. But the regular Solid Brass Jags (24% Off price $13.59) also work great and some folks think they are more durable. We own these Jag kits and use them for everything from a .17 HMR up to a 45/70. Both kits contain 13 jags covering these calibers: .17, .20, .22, .243/6mm, .25/6.5mm, .270/7mm, .30, .338/8mm, .35/9mm, .375, .40, .44 and .45.
BONUS: 12 Days of Ammo Discounts at Target Sports USA
Every day through December 20, 2024 Target Sports USA is offering special deals on bulk ammunition and primers. There are typically 4 to 5 specials each day (released at 12:00 pm ET), offering savings up to 40%. But take note — these hot deals are each good for 24 hours only. You’ll want to visit the Target Sports Ammo Promo Page each day through 12/20/2024.
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One of our Forum members asked us the question: “Does anybody make a good range box with cradles for cleaning at the bench?” The answer is yes — the MTM model RBMC Range Box offers slide-in plastic cradles that provide a reasonably sturdy platform for a quick clean when you’re done shooting. The RBMC box also offers plenty of storage for jags, brushes, solvents, ammo boxes and other miscellaneous gear you need for the range.
Among the many range boxes available, the MTM model RBMC Range Box leads the pack in terms of versatility. It is rugged, it has plenty of storage space, and it doubles as a handy cleaning station. This Editor has used the MTM Range Box to clean rifles and as a “range expedient” rifle holder when adjusting scopes and tensioning action screws. It’s a good product that does the job and stands up to rough handling. The MTM Shooting Range Box is in stock now for $49.99 at Midsouth (green version).
Fitted Cleaning Cradles
The key feature setting MTM’s RBMC apart from most range boxes is the rubber-coated cradle system. Wide enough to fit a 3″-wide fore-arm, the cradles slide into vertical slots on either end of the box. This allows your range box to serve as a maintenance station. The RBMC is really pretty stable in this role, and the cradles won’t mark your stock. The cradles even feature slots on each side to hold your cleaning rods. The MTM Range Box is secure enough to stay in place when you’re brushing the barrel. However, if you’re working on a carpeted bench top, keep one hand on the box when running a cleaning rod through the bore, just to ensure the box doesn’t slide.
Versatile Upper Tray with Dividers
The MTM Range Box has two major components — the box base (with cradles), and a large upper tray with hinged top and carry handle. This large upper tray clamps securely to the bottom unit for transport. The top tray has a long section that holds cleaning rod guides, long brushes, grease syringes and the like. There are two, clear-plastic fitted divider trays. These will hold your patches and jags, plus comparators, ring wrenches, and other small tools.
MTM offers a black “tactical” Range Box for $50.71 at Midsouth. This black Tactical Range Box includes a special bracket that supports AR-type rifles through the magazine well. As show at right, this is red. However, some previous production models had black magwell brackets (see below).
What Might Be Improved
Though we really like the MTM Range Box, it’s not perfect. First, we wish the box was a bit deeper, to have added carrying capacity. The dimensions of the MTM Range Box are: 25″ long x 11.5″ wide x 8.75″ high. We’d like to see it 12″ high/deep to allow larger solvent bottles to stand upright and to provide more space to carry tools and shooting muffs. However, it is deep enough to hold the large 100-round MTM cartridge boxes that are popular with many shooters (see photo at right).
While we like the twin clear plastic dividers that fit into the removable top-tray, but we wish the dividers had individual hinged tops. This would keep small items more secure.
Are you looking to have some shooting fun this holiday season — perhaps having a fun day with the kids or grand-kids? Then check out the colorful, innovative Game Series of paper targets from Action Target, a leading manufacturer of steel targets and shooting supplies. These can be used in indoor ranges or outdoors in warmer climates where there’s no winter snow on the ground.
Inspired by arcade games, tabletop gaming, circus themes, and team sports, the new Game Series paper targets are designed to be engaging — to involve the shooter in a fun process, rather than just aiming at dots on paper. The sports targets let you enjoy Baseball and Hockey. The nostalgic arcade target designs capture the fun of an amusement park. Some targets, such as ‘Alien Invasion’ (above), feature fluorescent colors that “glow” when used indoors with black lights. You can even enjoy darts and billiards targets.
The selection of games is impressive — there are currently 18 different Game Series targets — really something for everyone. NOTE: These Game Series targets are not inexpensive. A single Game Series target costs $1.59. However, if you buy at least 100 targets (one or more types), the cost per target goes down to $0.87, a 45% savings.
This video shows a variety of Game Series Targets being used at an indoor range. You can see they are large, brightly colored, and fun to shoot.
The 6mm ARC cartridge is a new SAAMI-spec cartridge based on the 6.5 Grendel case necked down for 6mm bullets, with the shoulder moved back 0.030. Yes it is designed to run in AR15-platform rifles. You’ll need a new barrel, bolt, and mags. If you already have an AR chambered in 6.5 Grendel, the ONLY thing you need to change is the barrel. Everything else — bolt, magazines, gas system – is compatible with 6mm ARC. 
MTM offers a black “tactical” Range Box for 
What Might Be Improved
