If you run into this problem again just run by Publix and get some dry ice. Drop the barrel in it for 20-30 minutes and it may just drop right in, especially if you warm the upper a bit.
Now, it may never come out....
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A Tale of Two Crush Washers, or Two Crush Washers One Barrel, and other AR oddities
- Thread starter cmshoot
- Start date
Now, it may never come out....
Had a customer bring in the worst-assembled lower I've ever seen. He said it was assembled for him by a co-worker. He brought it in because the trigger wasn't resetting.
It had 2 receiver end plates. Castle nut was slightly over finger-tight, and was not staked. Whatever he used to "tighten" the castle nut chewed up the wrench notches in several places.
He was one revolution shy of screwing the receiver extension fully into the receiver. It failed to retain the buffer retainer, which had launched itself into the FCG.
The takedown pin had a spring, but no detent.
Trigger spring was installed improperly.
He bent the hammer spring so badly that it wouldn't return to normal.
He had polished the engagement surfaces of the trigger to an excessive degree. Hard to tell in the pic, but when he polished it he heated the surfaces up enough to change the color. Also, the surfaces were no longer square. Triggers are surface hardened. In my opinion, this was polished enough that it was quite likely completely through the hardened layer, and into the softer steel underneath.
It had 2 receiver end plates. Castle nut was slightly over finger-tight, and was not staked. Whatever he used to "tighten" the castle nut chewed up the wrench notches in several places.
He was one revolution shy of screwing the receiver extension fully into the receiver. It failed to retain the buffer retainer, which had launched itself into the FCG.
The takedown pin had a spring, but no detent.
Trigger spring was installed improperly.
He bent the hammer spring so badly that it wouldn't return to normal.
He had polished the engagement surfaces of the trigger to an excessive degree. Hard to tell in the pic, but when he polished it he heated the surfaces up enough to change the color. Also, the surfaces were no longer square. Triggers are surface hardened. In my opinion, this was polished enough that it was quite likely completely through the hardened layer, and into the softer steel underneath.
Geez.... you're soooo critical
This is your "PSA"... Remember to use proper torque specs...
Pfft, cross thread with some jbweld. It ain't moving
I've heard good things about JB Weld....
