AR-15 not extracting - Chicagoland Sportbikes
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post #1 of 7 (permalink) Old 03-20-2013, 04:41 PM Thread Starter
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AR-15 not extracting

So my buddy put together an M4 and he is having some issues with it. I'm pretty green with how this riffle works so I figured I would ask around. His riffle is for the most part home built or pieced together. It will fire fine but will not extract the spent casing. He tells me the casing does not have scuff marks on it from the extractor trying to pull it out, infact no marks on the spent casing at all. When he manually pull the charge handle the casing flies out and loads the next round properly. I'm guessing the riffle is not cycling at all? He has only shot about ten rounds total out of it and has not yet watched close enough to see if it is actually cycling. He said he had R Guns instal an Osprey gas piston set up in it. Also he is not 100% sure what buffer and spring it is, he purchased them at a gun show. what do you guys think?
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post #2 of 7 (permalink) Old 03-20-2013, 05:29 PM
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1) the gas block is not lined up properly on the barrel thus not flowing gas to the rear properly
2) the gas tube is clogged


Have him check to see if there is any carbon on the bolt carrier key. If there is not then gas is not getting to the rear.
If he can manualy cycle the gun with no issue then gas is your problem.

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post #3 of 7 (permalink) Old 03-20-2013, 05:31 PM
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extractor is in the bolt, could be part of the gas piston kit as they usually replace the bcg , i would say its r guns problem, or could be sticky chamber/cosmoline/bad ammo(wolf steel case w coating), did it ever work with a standard bolt/gas system?
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post #4 of 7 (permalink) Old 03-20-2013, 05:32 PM
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Quote:
Originally Posted by Ofc. Ponch View Post
1) the gas block is not lined up properly on the barrel thus not flowing gas to the rear properly
2) the gas tube is clogged


Have him check to see if there is any carbon on the bolt carrier key. If there is not then gas is not getting to the rear.
If he can manualy cycle the gun with no issue then gas is your problem.
He said he had R Guns instal an Osprey gas piston set up in it.
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post #5 of 7 (permalink) Old 03-20-2013, 05:44 PM
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Didnt even see that part!

still could be the gas block lined up wrong on the barrel. Otherwise check the piston and rod.
As elroy stated above though, if someone installed the kit it should be there problem.

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post #6 of 7 (permalink) Old 03-20-2013, 06:32 PM
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ahhh, you're right, i focused on FTE when the problem is fail to cycle, if it cycled without extract it would pull up the next round and jam
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post #7 of 7 (permalink) Old 03-20-2013, 09:11 PM Thread Starter
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I'm not going to rule out carbon, but, it is prabably not that likely since it happended from the very first round though the gun. The gun has ten or less rounds though it total.

How can the alignment be checked between the gas block and the barrel? That sounds like a pretty good possibility. Also, after some googling and youtube, I found that some people say leave the gas rings on after installing the Osprey and some say remove them. We checked and R Guns left them installed on the gun. I'm thinking take them off?
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