7.62 AR-10 mild Kaboom

[duece71]

Interested in finding out what happened. Doesn’t seem that the trigger could be pulled with the BCG not fully forward or could it? MWS owner here and reloader. I have shot my 16” CL barrel suppressed with a SF SOCOM mini. I have an adjustable gas key from Rubber City armory that was recommended by LMT to solve the over gassing issue.
The case bulge is suspicious as it would indicate an out of battery firing. Tagged for interest.

[Pappabear]

Think I should replace the cam pins on my other two MWS bolts ?

PB

[georgeib]

Think I should replace the cam pins on my other two MWS bolts ?

PB

Can't hurt...

[sinister]

Interested in finding out what happened. Doesn’t seem that the trigger could be pulled with the BCG not fully forward or could it? MWS owner here and reloader. I have shot my 16” CL barrel suppressed with a SF SOCOM mini. I have an adjustable gas key from Rubber City armory that was recommended by LMT to solve the over gassing issue.
The case bulge is suspicious as it would indicate an out of battery firing. Tagged for interest.

If the bolt was so far out-of-battery that the bulged portion of the case wasn't chambered (and supported) the hammer could never have hit the firing pin -- its travel arc doesn't allow it to hit the base of the pin (it would have hit the base of the bolt carrier and dissipated its energy).

A bolt cam pin separated at the firing pin hole would have had to crack, separate, and lodge between the upper and carrier (in the cam pin pocket in the upper), allowing the BCG to go forward but not cam the bolt to lock in the extension (giving you a gas-assisted blow-back BCG).

Because it had nowhere to go, the top part of the cam pin (above a firing pin hole separation) may have stopped the carrier group from recoiling to complete extraction, ejection, and cocking.

[Todd.K]

If the broken part jammed the firing pin protruding from the bolt face, the hammer hitting the carrier could have possibly set it off.

It looks like about the right amount sticking out if the bolt stopped on the back of the barrel extension. A broken cam pin means the lugs on the bolt could be aligned with the lugs on the extension rather than between them.

[markm]

Interested in finding out what happened. Doesn’t seem that the trigger could be pulled with the BCG not fully forward or could it?

We've had dirty MWS sessions where the bolt is not quite fully locked and in battery, but the trigger will drop the hammer. No ignition occurs because the hammer can't strike the firing pin correctly.

Too bad we couldn't inspect the cam pin before returning it to LMT. I wish I'd have taken a pick of the inside of the upper where the gash was. That could very well have been a chunk of cam pin mashed between the carrier and inner receiver wall.

[SFree]

Makes you wonder if these large frame gassers are worth the squeeze… Anything past 4-500 yards and a mag fed bolt gun does as well or better. I know nothing, just an observation.

[Pappabear]

I think these guns are amazing. If I was stuck in the sandbox, MWS would be my wish. I love bolt guns but a great gasser with 20 rounds is priceless. YMMV

[georgeib]

Makes you wonder if these large frame gassers are worth the squeeze… Anything past 4-500 yards and a mag fed bolt gun does as well or better. I know nothing, just an observation.

I think these guns are amazing. If I was stuck in the sandbox, MWS would be my wish. I love bolt guns but a great gasser with 20 rounds is priceless. YMMV

Exactly PB. It's the entire idea behind the REPR concept. The same practical accuracy as a bolt gun, same weight, much faster ability to send multiple rounds down range.

[SFree]

[QUOTE=georgeib;2979075]Exactly PB. It's the entire idea behind the REPR concept. The same practical accuracy as a bolt gun, same weight, much faster ability to send multiple rounds down range.[/

Big question is if LMT takes care of the customer and product.