Posted: 9/30/2011 12:25:42 PM EDT
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I finished building my A2 a few weeks ago, and finally got a chance to take it to the range today.
The first two mags, a 20 rd GI and a 20 rd PMAG went through just fine (wolf steel cased) Then I put in a mag of M855 in a GI mag and ran it with no trouble (used it for zeroing) Another GI mag with steel cased, first half of the mag, the rifle would fire, bolt would come back but it would only push the round about half way out of the magazine, and stop, it did this on the first 15-20 rounds, then for no reason, it shot the next ten without a hiccup. I tried another GI mag with a non-tilt follower and brass cased .223 and had the same occurrence every 3-4 rounds. never had this happen on any AR before, in the Army, or civilian. Anyone seen this before ? is it the mags, the ammo or the guns? Thanks guys. Oh and IBTSA (in before the smart asses), I'm a machine gunner, I don't play with pea shooters too often 
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Quoted:
I finished building my A2 a few weeks ago, and finally got a chance to take it to the range today. The first two mags, a 20 rd GI and a 20 rd PMAG went through just fine (wolf steel cased) Then I put in a mag of M855 in a GI mag and ran it with no trouble (used it for zeroing) Another GI mag with steel cased, first half of the mag, the rifle would fire, bolt would come back but it would only push the round about half way out of the magazine, and stop, it did this on the first 15-20 rounds, then for no reason, it shot the next ten without a hiccup. I tried another GI mag with a non-tilt follower and brass cased .223 and had the same occurrence every 3-4 rounds. never had this happen on any AR before, in the Army, or civilian. Anyone seen this before ? is it the mags, the ammo or the guns? Thanks guys. Oh and IBTSA (in before the smart asses), I'm a machine gunner, I don't play with pea shooters too often check the lips of the mag would be my first guess. also, i would mix ammo in the same mag except for having a tracer round as the second from last round. also, i wouldnt use russian ammo. |
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not that this is your problem with so little rounds fired but the steel cases apparently expand less and let more carbon buildup in the chamber If you shoot brass after the brass will stick to the carbon. This may have extracted but took too much energy and the bold had too little pressure to fully chamber. I would clean the chamber and try the rifle again with just the brass and see if you have problems still. |
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Quoted:
not that this is your problem with so little rounds fired but the steel cases apparently expand less and let more carbon buildup in the chamber If you shoot brass after the brass will stick to the carbon. This may have extracted but took too much energy and the bold had too little pressure to fully chamber. I would clean the chamber and try the rifle again with just the brass and see if you have problems still. That's what I was trying to think of. |
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Quoted:
Quoted:
not that this is your problem with so little rounds fired but the steel cases apparently expand less and let more carbon buildup in the chamber If you shoot brass after the brass will stick to the carbon. This may have extracted but took too much energy and the bold had too little pressure to fully chamber. I would clean the chamber and try the rifle again with just the brass and see if you have problems still. That's what I was trying to think of. If it's not pushing the rounds all the way out of the mag it won't be a chamber issue. Could be the mag, could be the buffer spring being too weak or short (sure it's not a carbine spring?) Are the rds hitting the feed ramp? Could be they're rough and need a polisher M4'ing. I've had to do this a few times |