I had a first for me last week at the range. I had the 9mm AR out and a buddy and I were putting quite a few rounds through it. My friend was shooting when there was a louder than usual bang and the magazine was forced out of the mag well. I cleared the gun and we found half a case on the ground with the primer hole blown out. The bullet was lodged about 4 inches down the barrel and the rest of the case was still in the chamber. The ammo was factory fmj 115 gr blazer brass. Do you think that factory round had too much powder, or was it a weak/damaged case?
In case anyone is wondering, the bullet came out easily at home after soaking with some corrosion x and then tapping out lightly with a rod.
Sounds like the gun may have fired out-of-battery. Almost impossible in an AR15 platform, but all machines fail.
Firing a subsequent round, after a squib load (that caused a projectile to be lodged in the barrel) would more than likely just cause a bulged barrel at 9mm pressures - not the kabomm you speak of.
How dirty was the bolt carrier group and firing pin channel?
Or you could have had a double charged cartridge... somewhat uncommon in 9mm.
I doubt is was a weak case.
If no one was hurt and the gun was not damaged, I would chalk it up as a reminder to always wear eye protection and treat every gun as the potential explosive devise that it is.
Coming back to the idea of a squib. I was always under the impression that a round fired into a squib that was already in the barrel would have much worse consequences than I experienced. As mentioned above, at the least wouldn't that result in two bullets in the barrel? The bullet I recovered was in good shape.
No, Lone Wolf. If I was starting over, I probably would have gone with PS. Especially after their recent combo deals of a 9mm AR and a Glock 19 for 1k.
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