AR Upper « Daily Bulletin

teslong borescope digital camera barrel monitor

As an Amazon Associate, this site earns a commission from Amazon sales.

November 24th, 2018

Out-of-Battery BANG! When Round Fires Before Bolt Fully Closed

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 Bullets, Brass, Ammo, Shooting Skills, Tech Tip 1 Comment »

July 3rd, 2017

Bargain Finder 93: AccurateShooter’s Deals of the Week

Accurateshooter Bargain Finder Deals of Week

At the request of our readers, we provide select “Deals of the Week”. Every Monday morning we offer our Best Bargain selections. Here are some of the best deals on firearms, hardware, reloading components, 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. Midsouth — Stars & Stripes AR Upper + Handguard, $279.99

Tomorrow is Independence Day. Here’s the perfect product for the Fourth of July — a Red, White, and Blue AR upper. This “Stars & Stripes” Limited Edition combines the Guntec USA stripped Upper Receiver with the Guntec USA 15″ Keymod handguard, tricked out with a patriotic paint scheme. The upper may be used to build multiple calibers in the AR15 family such as .223 Remington, 6.5mm Grendel, and 300 AAC to name a few. NOTE: This is just a stripped upper receiver and handguard, NOT a “complete” upper. You’ll still need barrel, bolt/carrier, buffer tube, buttstock, and complete lower assembly.

2. Bullets.com — Big CLOSEOUT Sale on Ammo

Bullets.com has a large selection of rifle, pistol, and shotgun ammunition on sale. You can get name-brand ammo at big savings right now. If you’re looking for factory pistol ammo you should definitely shop at Bullets.com this week. And there are even deals to be had on ultra-premium Lapua ammo — just about the best factory ammunition you can buy (at any price).

PMC Brand .380 ACP, $13.50 for 50 rounds ($0.265/rd)
Winchester Brand .40 S&W, $25.00 for 100 rounds ($0.25/rd)
Winchester Brand Q3131A1 5.56×45 (.223 Rem), $6.50 for 20 Rounds ($0.325/rd)
Lapua Brand, .308 Winchester, 155gr Scenar, $70.77 for 50 rounds, ($1.415/rd)

3. Amazon — RCBS Rock Chucker Supreme Press, $126.99

The RCBS Rock Chucker remains a classic — a big, strong, versatile press that can handle most reloading chores with ease. And now you can get a genuine Rock Chucker Supreme for $126.99 — a very good deal. The Rock Chucker offers plenty of leverage for case-sizing and the “O” is tall enough for long cartridges. The Rock Chucker has a very strong base and should last a lifetime. We’re not fans of the Rock Chucker’s priming system but most serious reloaders use a separate priming tool.

4. Amazon — Frankford Complete Master Tumbler Kit, $49.50

This Master Tumbler Kit contains everything you need to tumble rifle or pistol brass. Now on sale for $56.07 with free Prime shipping, this Kit contains: Vibratory Tumbler, Rotary Media Separator, Plastic Bucket, 3 lbs. Cleaning Media, and 4 oz. Brass Polish. NOTE: We considered this an excellent deal when it was priced around seventy bucks. At $49.50 it is a total steal — you could easily pay more than that for a decent vibratory tumbler alone.

5. Whittaker Guns — Howa Lightning 6.5 Creedmoor Rifle, $299.99

With this deal you can get a complete 6.5 Creedmoor Howa 1500 Rifle with HACT 2-Stage Trigger for just $299.99. That’s $150.00 less than the price of a Howa 1500 barreled action by itself! ($449.99 at Brownells). This is a no-frills rifle, but its hard to beat the $299.99 price for a solid, multi-purpose rifle. Use “As-Is” for hunting or drop it into a modular stock for tactical/practical games.

6. MidwayUSA — Packable Shooting Mat, $19.99

Here’s a heck of a deal on a good light-weight shooting mat. MidwayUSA has slashed the price on its Packable Shooting Mat. Available in Coyote Tan or Olive Drab, this 67″ Long x 31″ Wide padded mat is now just $19.99. This Packable Mat has some nice features, such as 12″ front flap, elbow pads, 0.15″ thick padding, and six staking grommets. It’s easy to transport, rolling up to a 9″ x 4.5″ package, secured with a heavy strap. If you need a low-cost, basic shooting mat, check out this deal. Weighing just 1.5 pounds, this a good, light-weight mat to keep in a vehicle or to use on a “walk-around” varminting hunt.

7. Midsouth — Lee Auto Bench Priming Tool, $23.99

This relatively new bench tool does the job very well, and it’s easy to change primer sizes and shell holders. The “feel” of this tool is very good (better than most other bench priming units). If you like to pre-prime cases before using a progressive — this $23.99 Lee Bench Priming Tool gets the job done fast. The tool includes a new folding tray with built-in primer-flipping feature that allows direct filling from common primer boxes. The tool mounting holes are spaced for the Lee Bench Plate system (#006-90251) or the device can be mounted directly to your workbench. REVIEWS by verified purchasers.

8. Amazon — Discovery Scope Level, $13-$16 (1″, 30mm)

If you shoot long range, you need a scope level. This Discovery scope level is fully CNC-machined to close tolerances for a good fit. It is available with inner diameters to fit scopes with either 1″ or 30mm main tubes. The 1″ version is just $12.99 while the 30mm model is $13.95. You could easily pay $35.00 or more for a 30mm scope level. Purchasers have praised this product: 89% of verified buyers rated this five stars.

9. Bullets.com — Handgun Safe, $49.95

This pistol safe keeps your handguns secure while still permitting instant “push-button” access. The three-button lock can be personalized with 3- to 8-digit codes, and there is a key override. This safe will hold two (2) full-sized pistols and can also store passports, cash, or other valuables. The spring-loaded door gives you near-instant response. The all-steel case also includes mounting holes for fixing the safe to floor or shelf.

10. Amazon — 630 1″-Diameter Target Spots, $9.65 Delivered

We use 1″-diameter Target Spots for sight-in and practice at 100-300 yards. These bright red/orange self-adhesive dots are easy to see. At 100 yards the high-contrast black diamond centers provide precise aiming points. We found this 10-pack of target spots on Amazon at a rock-bottom price. You get 630 total stick-on dots for just $9.65 with FREE Shipping. You can also get 360 Birchwood Casey 1″ dots from Midsouth for just $3.15, but shipping is extra. If you’re already ordering something from Midsouth, you may want to add the dots to your order.

Permalink Bullets, Brass, Ammo, Hot Deals, Reloading No Comments »

Newer Entries »

Choose a Topic

Find Posts by Day

Older Posts by Month

Featured Advertisers