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Lets see your AR-15


imschur

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  On 11/28/2017 at 10:41 PM, washguy said:

Sisco      " Found a six position carbine buffer and spring used for $10 at a gun show "    ya think that maybe this could be your problem?:laffs:   Wash

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Maybe, but it is in excellent shape. I am going to fiddle with it and see if I can make it work before picking up a new buffer/spring. That will be an option though. When I pull the charging handle back manually on an empty slide, it will not catch, so it has to be a clearance problem, not a lack of energy to pull the bolt back. It cycles beautifully. 

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  On 11/28/2017 at 11:31 PM, blue109 said:

So you are saying it wont lock back if you pull the charging handle back and manually activate the bolt catch?

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No it doesn’t. I will get into it tomorrow, but I think I have the buffer tube screwed in one turn too many. If not I will do some troubleshooting and see. 

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  On 11/28/2017 at 7:32 PM, Sisco said:

Tried it out at the range today with some M855 green tip. It ran flawlessly except it would not lock back on an empty magazine. I only had one magazine with, so I will have to see what happens with a different one, but I am guessing the BCG is going back far enough to chamber, but not quite far enough to lock open. Any quick fixes? Thinking I might try unscrewing the buffer tube one turn and retightening the stock ring to see if that allows it.

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Had screwed the buffer tube too far-in. Backed off one turn, Was still enough to hold the detente pin and spring down. Reassembled and it now holds the bolt back-on both the bolt catch and an empty magazine.

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