Took my DMR-style AR to the range today. Fired about 10 rounds through it and started having problems. Failure to extract/eject. In fact, in many cases the bolt didnt even unlock. Hmmm.
Ok, unload and let’s see whats going on. Pulled the bolt carrier and thought that, since it was new, I hadn’t really lubed it up. So, a quick couple of sprays of CLP and put it back in the gun. No joy.
Disassemble bolt. Aha! Gas rings!
Alright, now I’m really curious. My buddy is shooting an AR that is also virtually new (less than 50 rounds) so we went ahead and swapped bolt carriers and bolts (yeah, yeah, I know….) Same result. My carrier/bolt worked fine in his gun. Ok, try the ammo. His ammo failed in my gun, my ammo worked fine in his.
Ok, clearly the issue is not in the receiver (upper or lower). It’s gotta be something in the gas system. Couldn’t really do much at the range without proper tools. Came back to the house and took off the forend. Please note this:
“Well there’s yer problem!”
:::sigh::: You know, I have been shooting AR rifles for over thirty years and this is the first time I have ever had anything like this happen. Solution? A dose of Loctite and some torque.
And, really, if I had the proper hex wrenches with me at the range I could have taken care of this right there…so, lesson learned. I’ll head to the range tomorrow to confirm that, indeed, was the problem.