AR Sponsor
Posted: 2/27/2009 12:17:24 PM EDT
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Hey guys, I have run into a problem and wanted some advice. I recently bought a Ciener 22 conversion and have used it in all 3 AR's with 0 troubles to speak of. The other day at the range, I swapped the 22 for the regular bolt and fired some .223 through my latest build, which I have done before. I noticed the gun had a KICK to it unlike I have felt before from an AR. Almost like it was a bolt-action feel with the KICK it had. I fired a few rounds then put the 22 bolt back in. Ran a ton of rounds through it with no troubles, and fired my other AR I had with me with .223 ammo and it felt normal. After I got home and was cleaning the guns, I noticed the buffer was scuffed up on it. It's a standard carbine buffer assembly on a 16" Bushy upper and Denny's lower. Any ideas what may have happened or been the problem? I changed the buffer and spring but have not had a chance to fire it yet. I could hear the spring going back when fired, so I'm a n00b and figure someone may know something.
Here's picks of the buffer and .22 bolt. 
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DON'T PANIC!!!!!!
The problem are having on the buffer is Numbers 2 and 3, which are being caused by a protruding bur on the back of the carrier at the U channel slot. Use a stone and remove the protruding bur from the back of the carrier. Next, lets talk about what happens as you shoot lead bullet down a gas gun barrel. Out the gate, the lead from the bullets gets shaved off by the gas port in the barrel, and these shavings are transfered to the Front sight gas passage, and even the gas tube. Often, its the gas passage that gets blocked, leaving the rifle as a single shot, but once in a blue moon, the shaving will be free enough to be sent down the gas tube and this causes the addtional recoil as the lead mass slams into the back of the carrier key. Furthermore, there could be a gap between the chamber insert and the bore, and when the lead bullets are fired, the lead is shaved, and collects at the end of chamber cut, and when 223 ammo is fired, this caused the round to go over pressure (read more recoil as well). Are these the problem here, it's hard to say unless the rifle was shooting fine before with 223 ammo, and now just recoiling too much. If this is the first time that the rifle has seen 223 ammo, then it may be that the recoil spring is too weak, or the gas port size too large on the barrel, both which would cause over function/ excessive recoil. |
Thanks you Dano. 
The gun has seen .223 before and I don't remember it kicking this bad. Could the gas port be REALLY blocked from shooting 2000 rounds of .22 through it? I changed the spring and buffer and shot about 10 .223 rounds through it last night and it still did it. When it gets warmer I will try the lower on another upper and swap some stuff around . My dedicated 223 is heavier than this gun, but I'm not convinced that's the whole deal. Thanlks for the suggestions, and I'll keep you posted. Steve |
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