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March 3rd, 2015

AR-15 Bolt Sheds Lugs — Can You Figure Out What Happened?

AR15 AR-15 Bolt lug shear damage Kaboom gas system pressure

Black Rifle Gone Bad…
Take a close look at this AR-15 bolt. Notice something missing — namely all the lugs? A healthy AR-15 bolt has seven (7) bearing lugs (plus an extractor hump). For all seven lugs to have sheared “clean off”, something serious must have happened to this bolt assembly. The folks at Brownells published this “lost luggage” image on Facebook to spur discussion. So, you AR experts out there — what do you think caused the problem here? Was it over-pressure, metal defect, headspace problem, gas system malfunction (or some combination of issues)? Post your theories in the comment section below…

AR15 AR-15 Bolt lug shear damage Kaboom gas system pressure

Permalink Gunsmithing 81 Comments »
December 31st, 2014

Patriotic Pistol-Caliber Carbine Give-Away

Are you feeling lucky on this last day of 2014? Well Cheaper Than Dirt is giving away a very unique (and very patriotic) rifle. The Just Right Carbine is a simple, blowback-action semi-auto rifle that can be configured to shoot three different pistol cartridges: 9mm, .40 SW, and .45 ACP. The Just Right Carbine bridges the power gap between long guns chambered for rimfire cartridges and those using full-power rifle rounds. With caliber conversion kits, this modular carbine can shoot the three most popular semi-auto pistol cartridges: 9mm, .40 SW, and .45 ACP. The give-away rifle is configured to shoot one caliber, the 9mm Luger (9mm parabellum).

Just Right Carbine

This special-release Stars and Strips Edition carbine is finished in an American Flag camouflage. American Rifleman magazine says this rifle is versatile and easy to operate:

“At first glance, the JR Carbine is just another AR variant. Though it shares numerous parts and an outward appearance with the ubiquitous AR platform, the JR is actually of a totally different design. Unlike the AR’s gas-operated action, the JR Carbine uses a simple blowback system similar to that of the Ruger 10/22. The bolt is held forward by spring pressure and is cycled by the energy of the fired round; there are no gas tubes or pistons involved. While it doesn’t use the AR’s operating system, the JR Carbine does share with the AR its modularity and some parts commonality, so many of the myriad of AR accessories can be used on the JR. The carbine uses a standard commercial diameter AR buffer tube so any buttstock compatible with a commercial AR can be fitted to the JR. Mil-spec and commercial AR parts are also interchangeable with the carbine’s AR-style trigger, grip, and safety[.]”

Just Right Carbine

How to Enter Contest: For a chance to win this rifle, visit the Cheaper Than Dirt Contest Registration Page and complete the online entry form. Limit one entry per person and e-mail address during the Sweepstakes Period.

Permalink New Product No Comments »
November 12th, 2014

Zediker Writes about Long Range Shooting with the AR-15

Looking to shoot an AR-platform rifle out past 500 yards? Then you should read two recent articles by AR guru Glen Zediker. Author of The New Competitive AR-15 and The Competitive AR15 Builders Guide, Zediker is an expert when it comes to AR-platform rifles — he knows as much as any guy around. Glen believes ARs have excellent long-range capability, provided they are built to high standards, with good barrels. Glen says: “a properly configured AR-15 is easily capable of good performance at 500+ yards. Good performance means it can hit a 1-foot-square target all the time. Competitive shooters can cut that standard in nearly half (the X-Ring on an MR1 600-yard NRA High Power Rifle target is 6 inches, and high X-counts are commonplace among more skilled shooters).”

Published in the Cheaper than Dirt Shooter’s Log, Zediker’s pair of articles cover the history and upgrading of the AR-15. Part One reviews the AR’s development as an accurate firearm, tracing its evolution from a Vietnam-era combat weapon to what is now a favored target rifle of High Power competitors. READ PART ONE.

Long Range AR AR-15 Glen Zediker Cheaper than dirt

Part Two discusses the specifics that make an AR accurate at 500 yards and beyond. Zediker talks about barrel configuration (profile and twist rate), bullet selection, floating handguards, and proper mounting of optics or iron sights. READ PART TWO.

Long Rang AR AR-15 Glen Zediker Cheaper than dirt

Here are some highlights from Long-Range AR-15 Part TWO:

Barrel Twist Rate
To stabilize anything longer than a 68- or 69-grain bullet, the barrel twist rate must be — at minimum– 1-in-8. Twist rates reflect how far the bullet travels along the lands or rifling to make one complete revolution. So, 1-in-8 (or 1-8, 1:8) means “one turn in eight inches.” I think it’s better to go a little faster in twist. There is nothing wrong with a 1:7 twist. The 90-grain bullets require a 1:6.5, and that is getting on the quick side. If you want to shoot Sierra 77s or equivalent, and certainly anything longer, 1:8 is necessary. By the way, it is bullet length, not weight, which constitutes the necessary twist rate to launch a stable bullet.

Optics Mounting
Correct optical sight positioning can be a challenge. With a flattop upper, I need a good inch additional forward extension at the muzzle side of the upper for the sight mount bases to avoid holding my head “back” to get the optimal view through the scope. A longer rail piece is necessary for my builds as a result.

Buttstock Length and Adjustment
An adjustable buttstock is valuable, and even more valuable if it’s well-designed. Mostly, a standard stock is too short, and the cheek area sits too low. Adding length helps a lot by itself. There are assemblies that replace the standard buttplate to allow for length and, usually, height and rotation adjustments for the buttpad. An elevation-adjustable cheekpiece is a big help to attain a solid position.

Permalink - Articles, Gunsmithing 2 Comments »
November 3rd, 2014

Building an AR? Check Out Zediker’s Book Before You Start

AR15 Varmint rifle AR gunsmithing robert whitley

AR15 construction guideMany of our readers use AR-type rifles for Service Rifle matches, varmint hunting, 3-Gun competition, or defensive use. AR-platform rifles can be configured in a multitude of ways to suit the application. But if you plan to put together your own purpose-built AR rifle, how do you get started?

For AR Do-It-Yourselfers, we suggest reading Glen Zedicker’s book, the Competitive AR15 Builders Guide. Following Zedicker’s New AR-15 Competitive Rifle (2008), the Builders Guide provides step-by-step instructions that will help non-professional, “home builders” assemble a competitive match or varmint rifle. This book isn’t for everyone — you need some basic gun assembly experience and an aptitude for tools. But the AR-15 Builders’ Guide provides a complete list of the tools you’ll need for the job, and Zedicker outlines all the procedures to build an AR-15 from start to finish.

Along with assembly methods, this book covers parts selection and preparation, not just hammers and pins. Creedmoor Sports explains: “Knowing how to get what you want, and be happy with the result, is truly the focus of this book. Doing it yourself gives you a huge advantage. The build will honestly have been done right, and you’ll know it! Little problems will have been fixed, function and performance enhancements will have been made, and the result is you’ll have a custom-grade rifle without paying custom-builder prices.”

The Competitive AR-15 Builders Guide is not available from most large book vendors. However, Amazon still has a few copies in stock. CLICK HERE to order.

Permalink Gunsmithing, Hunting/Varminting 2 Comments »
October 23rd, 2014

Amazing Price: $49.99 AR-15 Stripped Lower at Brownells NOW

Got fifty bucks? Well that’ll buy you an AR Lower this week. Quite simply, this is the best AR deal we’ve seen this year, and one of the best values on a firearm receiver we can remember. Right now, while supplies last, Brownells.com is offering Bushmaster-brand AR-15 stripped lower receivers for just $49.99. You read that right — you can get a major manufacturer AR lower for under fifty bucks. That’s a savings of $120.00 off the normal price. Get them while you can.

AR15 AR-15 lower stripped receiver Bushmaster

NOTE: Stripped lowers are considered the firearm, so this must be delivered to an FFL-holder. It is fairly easy to complete the lower with readily available parts and the trigger group of your choice.

AR15 AR-15 lower stripped receiver Bushmaster

Bushmaster Stripped Lower Receiver Product Description
Receiver is a rigid 7075 T6 aluminum forging with extra metal in the right places for added strength without unnecessary bulk. Features a beefy, M16A2-pattern reinforced area around the front pivot pin, a strengthening ridge over the receiver extension threads, and a ridge around the mag release button to guard against accidental magazine drop by preventing unintentional button activation. Bead blasted after machining to ensure a uniform, non-reflective surface before application of lusterless black military hardcoat A8625, Type III, Class 2 anodized finish that adds surface strength and resists abrasion. A final, nickel acetate seal coat provides extra protection against corrosion. Stripped lower is the perfect companion for Bushmaster Lower Receiver Parts Kit, available separately

Permalink Gunsmithing, Hot Deals, Tactical 3 Comments »
June 4th, 2014

CMP’s Rifle Small Arms Firing School Returns to Camp Perry

Report based on story by Ashley Brugnone, CMP Writer/Editor
Would you like to learn AR marksmanship under the tutelage of world-class USAMU team members? Then consider attending the Civilian Marksmanship Program’s Rifle Small Arms Firing School (SAFS), held Wednesday, July 16-17, during the National Rifle and Pistol Matches at historic Camp Perry. SAFS courses have been conducted at the National Matches since 1918. Hundreds of rifle participants are expected this year.

small arms firing school cmp camp perry usamu

The school is structured toward teaching new shooters, so no past firearm experience is required. Intermediate shooters are also welcome to participate. Students will learn basic firing practices and competition skills. In addition to the live fire practice, students will compete in an EIC Match. All participants will be instructed by members of the U.S. Army Marksmanship Unit (USAMU) and coached by Military Rifle Team Members or CMP Rifle Master Instructors.

CLICK HERE for Small Arms Firing Schools INFO | CLICK HERE for Rifle SAFS Registration.

For those already familiar with rifle shooting, an Advanced Rifle Course will also be held to provide additional class instruction and the chance to fire in a special Excellence-In-Competition (EIC) Match. Whether an experience shooter or picking up a firearm for the first time, come enjoy a day of fellowship and fun in one of America’s oldest pastimes with the security and knowledge of some of the best marksmen in the country!
small arms firing school cmp camp perry usamu

Permalink Competition, Shooting Skills No Comments »
May 3rd, 2014

Lyman Releases New AR Reloading Handbook

Lyman AR15 reloading guide handbook bookAR this, AR that… sometimes it seems the gun world has gone AR crazy. There is even a book specifically dedicated to reloading for AR-platform rifles. This may seem superfluous when there are so many other reloading manuals on the market. However, there are some special factors to consider when reloading for ARs and other semi-automatic rifles. Cases should be full-length sized, with adequate shoulder bump and neck clearance (more than you might run with a bolt gun). Cartridge pressures must be appropriate for the AR platform, and you want to select powders that minimize fouling. Also, when loading for an AR you may want to experiment with cannelured bullets and crimping. And of course, rounds must be loaded to mag-length. Lastly, with the advent of the 300 AAC Blackout (and similar cartridges), many AR shooters now are experimenting with heavy 30-cal bullets in subsonic applications. AR owners will experience a “reloading learning curve” when moving from .223 Rem to the more exotic, subsonic 30-caliber cartridges.

These and other concerns are covered in Lyman’s new AR Reloading Handbook. This comprehensive reloading guide provides the AR shooter with reloading data for nearly all popular AR-platform chamberings. In addition to data for the standard .223 Rem, the following cartridges are also covered: 6.8 Rem, 300 AAC Blackout, 7.62×39, 450 Bushmaster, 50 Beowulf and others.

J&G Sales AR 15 Gallery Suppressor

Lyman touts its new book: “Reloaders will appreciate the wealth of AR-specific reloading data [for] all popular brands of bullets and powders. Specialty cast bullet and sub-sonic data further expand the usefulness of the handbook. Interesting articles by well known and popular firearms journalists are also included. These cover such areas as ‘Reloading for Suppressors’ and ‘Cartridge Interchangeability”. Finally all this AR data is presented in a full size, easy-to-use 8 1/2″ x 11″ format.”

Suppressed AR15 photo courtesy J&G Sales Ltd..

Book tip from EdLongrange. We welcome reader submissions.
Permalink Reloading, Tactical 1 Comment »
February 27th, 2014

Hot Promo: Buy a Nikon Scope, Get FREE AR Scope Mount

Nikon has just announced its Mount ‘Em Up Promotion, which runs now through March 31, 2014. Here’s how it works: If you buy a qualifying Nikon scope, you can get a free scope mount worth up to one hundred bucks. Get an AR-specific Nikon scope mount with purchase of select M-223, P-223 or P-300 BLK AR riflescopes. “Year after year the Mount ‘Em Up promotion continues to be a favorite among our customers,” said Nikon General Manager Jon Allen. For more info, visit NikonPromo.com.

Spot On Nikon ballistics scope optics

FREE M-223 XR mount ($99.95 value)
with these NIKON riflescopes:

Product # and Model
16300 1-4×20 M-223 Point Blank
16301 1-4×20 M-223 BDC 600
16302 2-8×32 M-223 Nikoplex
16303 2-8×32 M-223 BDC 600
16304 3-12×42 M-223 Nikoplex
16305 3-12×42 M-223 BDC 6000

FREE P-Series Mount ($49.95 value)
with these NIKON riflescopes:

Product # Model
8496 3×32 P-223 BDC Carbine
8497 3-9×40 P-223 BDC 600
6797 2-7×32 P-300 BLK BDC Supersub

Like all Nikon riflescopes, every model featured in the Mount ‘Em Up promotion is optimized for use with Spot On™ Ballistic Match Technology. This provides users with exact aiming points on the BDC reticle for any load or ammunition at a specified range. Get free Spot On ballistics solutions online at NikonSportOptics.com/spoton. You can also order Spot On Custom turrets calibrated by Nikon for your load.

Spot On Nikon ballistics scope optics

Permalink Hot Deals, Optics No Comments »
December 13th, 2013

New DVD Lists 1300 AR Variants with Specs and Schematics

DVD AR Rifles AR15 Digital GuideIf you can’t get enough info on ARs, check this out. The folks who brought you the Firearms Guide, have released a new, comprehensive resource for AR-Platform rifles — of all calibers and configurations. The new AR Rifles Digital Guide presents over 1,300 semi-auto and full-auto AR-style rifles from 65 manufacturers worldwide. AR rifles in calibers from .22 LR to .458 SOCOM are covered with technical specifications, features, prices, and up to 12 high-rez, zoomable pictures for each model. This new DVD also contains a schematics library with printable and zoomable exploded views and parts lists. This is great for gunsmiths and guys working on AR projects.

This $15.99 AR resource DVD has thousands of pages of content, all easily searchable with ten different search criteria including: caliber, price, manufacturer, gun finish, barrel type, country, and more. The DVD’s search engine lets you quickly find AR rifle models, schematics, parts lists, and other information. In addition, the AR Digital Guide features a comprehensive ammo database. Choose a cartridge type and caliber. Then, with just one click, you can access information on bullet styles, bullet weights, features and ballistics of all the currently available ammunition in that chambering.

DVD AR Rifles AR15 Digital Guide

Easy to Buy, Easy to Run
You can order the AR Rifles Digital Guide DVD directly from FirearmsGuide.com for just $15.99. DVDs start shipping on December 19th — just in time for Christmas. This unique AR Rifles DVD works on Windows XP, Vista, 7 & 8. Just drop the DVD in your CD/DVD drive, and it starts automatically — no software installation is required.

Permalink New Product No Comments »
April 5th, 2013

Great Deal on Fitted AR Gun Cases from Patriot Cases

Our buddy Dennis Santiago found a great deal on a good gun case for AR-platform rifles. Now, as a special promo offer, you can get the Patriot AR case, for just $59.99. This case will fit ARs with barrels up to 20″ in length. NOTE: The photo shows Patriot’s AR case with custom-profiled foam. This case will accommodate virtually any AR with barrels up to 20″ long (some foam cutting required for A2-style stocks). Exterior length of the case is 41.5 inches, and internal length is 40.0 inches. Along with the main, pre-cut rifle cavity, there are cut-outs for four (4) magazines, a suppressor, and boxed ammo. The foam is high-density, 2.2-lb Mil-spec polyethylene. Patriot claims this dense foam is “impervious to cleaning oils/solvents, and will not hold moisture”. The case features six (6) molded holes for padlocks, and there are guards protecting the latches. This case carries an ATA Specification 300 II rating.

Patriot AR gun case

Patriot AR gun case

Brack Wilson of Patriot Cases explains: “FINALLY, after hundreds of requests, our new AR case is available for purchase online at PatriotCases.net This is an incredible deal at only $59.99, and we are offering a special discount for purchases through end of day Monday (April 8, 2013). Enter discount code Facebook at checkout.”

Patriot AR gun case

Dennis Santiago tells us: “If you have one of these genetically modified AR-15s set up in 21st Century shooting configuration, this is the case for you. This is perfect for your 3-gun machine…. Friend Brack Wilson just started making them and they went up on his company’s shopping cart today. It’s a solid, lockable design that uses mil-spec heavy foam. They’re on introductory special this weekend so now’s the time to grab one. Enter discount code “Facebook” at checkout and it will deduct $10 from the total cost (so your net cost is $49.99). I think this is the deal of the weekend.”

Dennis hopes that Patriot will produce another version for High Power Shooters: “For you high power guys, I’ve asked Brack to consider making a version with cutouts for the Service Rifle AR-15 with magazine cut outs for one of those Creedmoor mag pouches, a couple of more 20-rd mags (sled + sighter mags), an ECI, a sling, a scorebook. Our kind of stuff. It’d be nice to have a proper hard case with the right cutouts for these guns. It’ll make them safer for transport going to matches.”

Permalink Hot Deals No Comments »