Just received a stub I bought for a project. .410 barrel that's been cut off and de-milled, going on a 2004 rifle receiver.
Locks up with a nice click. No visible top gap. Locks up with aluminum foil. Latch lever has good movement when locked up both with and without aluminum foil. Will not lock up with a post it note. No side to side play at all. I think I'm good to go, but would feel better with your input.
Should I play the lottery today?
