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Posted: 8/31/2007 6:34:30 PM EDT
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I was at the range today with my Colt AR15. I had installed a (used) CAA collapsible stock on it back in the winter, and this was the first time I had shot it with that attached. Anyway, I shot around 100 rounds sighting in a new optic, and blasting at a laundry detergent bottle---no problems. Then the gun jammed. Long story short, the bolt only travels about 1/3 of the way, round is partially into chamber. Bolt seems hung up on magazine. I'm using aluminium USGI mags in good shape. I gave the guy shooting next to me one of my mags and had him shoot. He fired off around 10--15 rounds no problem. I've come home and put some snap-caps in, and the same thing happens. The round goes partially into the bore, and the bolt seems to be up against the magazine. I thought it might be the buffer spring (esp since it's a used buttstock), but looking at the snap-caps, I'm not so sure. I'd say the mags are no good, but they ran ok in the other guys AR (didn't get the make), so that seems odd. The problem is happening on putting in the first round, ie, chambering the first round of a mag. . . I don't have my digital camera at the moment, or I'd post pics of the jam. . . What might it be? |
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Is it possible that you didn't install the stock correctly and that the buffer detent is binding up the bolt carrier? A buddy of mine swapped out stocks on a buddy's rifle and didn't set the stock tube to the right located for keeping the buffer detent in all the way and the same thing happened to him... |
| So you are saying that the bolt is hitting the back of the round, but is not pushing it out all the way out of the mag and into the chamber? I would pull the buffer spring, measure it and compare it to the recommended length in the M16 armorers manual. Could just need a new spring. |
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Check the chamber for a seperated case. The last case head seperation I had left the front half of the case in the chamber, so the next round would not go completely into battery. The only odd thing it did was sound different and the rear half of the case was lying on the bench next to the rifle. If it is a ruptured case it can be removed with a ruptured case remover or sometimes a tight patch from the muzzle will push it out when it is cool. Good luck, Dan |
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Bingo! Except it wasn't seperated. Just a spent case that wasn't extracted. As they said in "A Few Good Men", "don't I feel like an ass$%*@ ! Would of seen it. . .IF I'D LOOKED FOR IT! Memo to self: you are a jerk. Geez. . . thanks, everyone for your assistance. ETA: is seems that the section of rim broke where the extractor grabbed it. . . first time I've had a problem with Wolf. . . |
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