blem BCM upper receivers on sale (Read 787 times)

ren

blem BCM upper receivers on sale
« on: December 16, 2022, 09:16:21 PM »
Deeds Not Words

robtmc

Re: blem BCM upper receivers on sale
« Reply #1 on: December 17, 2022, 07:00:59 AM »
I just assembled one for my Arizona toy.  It is indeed tight and the only blem is from me tapping in the forward assist pin..  Propane torch and 400° as measured with IR checker, slipped right on the barrel.

Hit it with my lapping tool and the receiver face was off just a bit.  It was high around the pin notch.  Seen that with another brand upper, may be a result of the tooling they use.
Still going by it cannot hurt to true the face, no personal proof it does anything.