AR buffer tube assembly

[battleship]

Its been a while since i had a had my AR assembled, today i got another receiver out of the 10 day wait period, its been about 6 months since i had the AR in one piece.
After attaching the lower to the upper, i then re-installed the Socom stock and buffer tube to the lower, pressing the buffer tube and spring back into the Socom stock tube i placed the tiny spring and cap that pins the buffer tube and spring in tension within side the Socom stock.

Well after charging it a few times it jammed, once i opened the lower i noticed the cap on the spring had popped off the spring and the spring was now bent beyond salvage, so what did i do wrong in the assembly, this had never happened before, im assuming when charging the bolt back into the buffer tube that pin and spring some how was able to pop up and get jammed leading to the malfunction.

Any advise would greatly help

[Mute]

Sounds like your tube wasn't screwed in far enough to retain the cap and keep it in its place.

[jksupplyco]

^What he said... +1

[battleship]

I think you might be right.

[Army]

Push in buffer retainer detent. Screw in buffer tube until stops on the point of the detent. Slowly unscrew until: 1) The detent can be held in place and move easily, or 2) The recess on the end of the tube (new style) aligns with the detent, capturing but allowing free movement of the detent.Slide retention plate against receiver, being very careful to not smash the take-down pin detent spring.Screw lock ring tight against receiver, and stake at the small cut-outs (or blue Loc-Tite)Slide on buttstock.....and shoot the dang thing already