Order a new detent spring and detent. I looks like the receiver extension needs to be installed in 1 more revolution. Easy and cheap fix
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Order a new detent spring and detent. I looks like the receiver extension needs to be installed in 1 more revolution. Easy and cheap fix
He can't thread it in any more past the flange. It is a rifle tube, not a carbine tube.
Ordered a magpul armorer tool and a new detent spring. Hopefully I can get it running right again.
Is there a gap between the receiver and extension flange or buttstock? If so, it should definately be screwed in all the way. If no gap, you will need a new receiver extension.
For rifle extension, I don't think the armorer tool is needed.
You are 100 percent correct. It would seem he tried installing the stock without removing the tube from the stock. I broke it down completely and when screwing the tube in by itself, it had a solid half turn more before bottoming out. All I need is to wait on a new detent spring and I should be good to go, no tool required besides a flat head screwdriver. Thank you M4carbine.net. Maybe if he was a member here he could have done it right the first time. Measure twice, cut once and all that....
double post
nof555 - I'm not real clear, this has an A2 stock on it it, correct? If I'm thinking correctly, you may be hosed. The A2 rifle extension has a shoulder on it and it screws all the way into the receiver. From my point of view, it should have had a little more metal holding the detent in place. If the guy didn't tighten it correctly, you may be in luck. Take the stock off, hopefully you have an armorers wrench, it should have a fixture/cutout for the protrusion on the end of the tube, torque it down good against the shoulder. I'm not sure what size open end would work, but if all else fails a crescent. If it was left a little loose by your friend, hopefully it will move enough to get away from that ate out section.
Oops, looks like you solved it while I was messing around. Good.
If you want official Colt: AR15A4 Buffer Retainer Spring or if you don't care about that Buffer Retainer Spring
ETA: Never mind looks handled.
I think he will need a new lower receiver extension. But without seeing it in person, I wouldn't be sure.