October 20th, 2020

Out-of-Battery Blast Breaks Rifle and Bones in Shooter’s Hand

out of battery kaboom bohica 50 bmg ar15

As posted in the Calguns.net a few years back, there was a nasty out-of-battery firing incident involving a BOHICA Arms .510 DTC AR15 upper. The cause of the out-of-battery firing is not certain but it appears that the ammo was not sized properly and the firing pin may have been stuck in the extended position. As a result, the round went off before the bolt was closed with the lugs seated. In the process, the bolt handle broke off, as the bolt retracted violently, actually ending up outside the bolt raceway.

out of battery kaboom bohica 50 bmg ar15

The shooter was badly injured, with broken bones and ligament damage to his left hand and tissue damage to his right hand. The shooter was holding the rifle with his left hand near the front of the chamber where a gas vent was located. Gas and shrapnel existed the vent hole causing the severe injuries to the left hand.

From range reports, it appears that the shooter had been struggling to chamber previous rounds, and was having trouble closing the bolt. After talking with one of the rangemasters, a poster on AR15.com reported: “The guy was using new reloads that weren’t exactly fitting well into his chamber. [The shooter] was slamming the bolt handle with his palm trying to get the cases to lock in. The guy was also slamming the bolt forward full force from the rearmost position back and forth trying to ram the cases into chamber in an attempt to squeeze the rounds in so the bolt could close. Finally, on one of the attempts … the possibly stuck firing pin rams into the primer and explodes the round when he slams the bolt forward (zero lug engagement hence the KB) and shooter puts himself into a world of hurt.”

Lessons Learned — Don’t Try to Force Oversize Ammo into a Chamber
By all reports, the shooter’s ammo wasn’t fitting his chamber properly. In an effort to force the ammo into the chamber, he worked the bolt with excessive force. That MAY have caused the firing pin to extend or the hammer to fall without the trigger being pulled. One theory is that the trigger system may have been modified, allowing the hammer to fall from the force of slamming the bolt forward. Others have speculated that the firing pin may have failed to retract because the bolt handle was over-torqued — a safety issue listed in the BOHICA manual.

out of battery kaboom bohica 50 bmg ar15

Whatever caused the out-of-battery firing, it appears that improperly-sized ammo (or a poorly-cut chamber) was the root cause of the problems. If you go to a range and find your bolt does not close easily over the ammo — STOP SHOOTING — don’t try to force the issue. Disaster may result. To paraphrase Johnnie Cochran: “If the ammo doesn’t fit, it’s time to quit”.

Photos by Wildcard, originally posted on Calguns.net.

Permalink Gunsmithing, Tactical, Tech Tip No Comments »
October 20th, 2020

Front Sleds Stabilize Narrow Forearm Rifles and ARs

Whidden Gunworks Track Plate

ARs and Narrow-Forearm Sporters Benefit from Front Bag-Rider Blocks
Whidden Gunworks offers a smart product that will enhance the bench-rested accuracy of any rifle with an accessory rail on the forearm. The Whidden Track Plate fits securely in the forearm accessory rail on prone, cross-the-course, tactical, and Palma rifles. These guns typically have a narrow and/or rounded fore-end so they rock and wobble when used with a front pedestal rest. The TrackPlate cures that. Once installed it provides a rock-solid, 2.9″-wide platform that mates perfectly with a benchrest-type front sandbag. This gives sling-shooters maximum stability when testing loads or zeroing their sights or scope. Plus you can now shoot F-Class competitively with a prone gun. (The 2.9″ width is 100% legal for F-Open).

Whidden Gunworks Track Plate

The Track Plate is light-weight, has catamaran-style runners to aid tracking and prevent rocking, and can be easily stowed in a range bag. The Track Plate fits BOTH Anschutz and American style forends and is made in the USA of machined aluminum. The Track Plate is available from Whidden Gunworks for $45.00.

Plate designer (and 5-Time Nat’l LR Rifle Champion) John Whidden says: “The Plate is great for any rifle with a rail whether it ís smallbore, centerfire, or an air gun. Now you can try F-Class with your favorite prone rifle: the Plate has a perfect low-drag finish for riding a rest or sandbags and is competition legal.”

Bag-Riders for AR-Platform Rifles from EGW
AR owners should check out the 3″-wide Delrin bag-rider from Evolution Gun Works (EGW). There are two versions, one for front Picatinny Rails, and another that mounts via sling swivel studs. These EGW Bag-Riders were developed expressly to fit the fore-ends of ARs. The front bag-riders are contoured to match the handguard profile so they fits securely with no wobble.

EGW AR15 ar bagrider bag-rider front sled

The $49.99 EGW Picatinny Rail front Bag-Rider simply slides on your under-forearm rail and there is a a tension bolt. Attachment is quick and easy. Or, if your AR has no rail get the original $39.99 EGW front Bag-Rider that attaches to a front sling swivel stud anchor. That allows it to mount as easily as a Harris bipod — no rail needed! Just unscrew the swivel stud, put the front bag-rider in place and attach one hex-head machine screw.

EGW AR15 ar bagrider bag-rider front sled

Also with the two front Bag-Riders, EGW offers a Rear Bag-Rider for ARs that attaches via the sling swivel anchor. Overall, it is a slick system. Front and rear bag-riders can be attached in a couple of minutes. The Delrin blocks slide easily in the bags and make the gun ultra-stable. The gun tracks straight back.

Permalink Gear Review, Tactical No Comments »
October 20th, 2020

Laser Engraving for F-Class Team USA on New Borden Actions

Borden action laser engraving

Borden action laser engravingJim Borden of Borden Accuracy/Borden Rifles is adding “something extra” to the Borden actions crafted for F-Class Team USA members. These actions feature a Team Name and Team shield thanks to modern computer-controlled laser engraving. Jim Borden posted: “Here is Tony at Endless Laser Art doing his thing. [Team members] James Crofts, Drew Rutherford, Dan Bramley, Keith Trapp here we come!”

Jim is crafting special actions for both the F-TR and F-Open Team USA squads with laser-engraved USA F-Class Team shields. There is a BRMXD-type called USA Open and a BRM-type action called USA FTR. The F-Open serial numbers start USAFOPEN01 while F-TR numbers start USAFTR01. These are offered to members of USA F-Class Teams.

Watch Laser Engraving of Borden Actions

Watch the video above to see U.S. Rifle Team shield laser-engraved on Borden actions for F-Class Team USA and F-TR Team USA.

Borden action laser engraving

Don’t Tread on Me — Laser-Engraved Ax Blade for NRL Founder
Here’s a another example of modern, computer-controlled laser engraving. Travis Ishida, one of the founders of the NRL Precision Tactical series, has obtained a laser engraving machine. This can be great for putting identifying marks on tools, metal gunstocks, motorcycle parts — basically anything where you want some words and/or graphics. We like the message Travis printed on his Ax: “Liberty or Death… Don’t Tread on Me”. Travis posted: “Finally got my laser engraver working and now I want to engrave everything in sight! This could be a lot of fun… and a little obsessive.”

Borden action laser engraving

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