The upper is face lapped, and thermal fit, with mil spec coating inside, and assembled on the MI upper rod. Professionally built, this has been a 100% reliable upper. About 1k rounds, zero failure. Just selling to change things up a bit, no longer need.
BCM upper
BCM MCMR 8"
BCM Gas block
BA MS 8" 300bo
Gas tube nitride
Blast can
$550 obo
Also available:
Radian raptor SL CH $100
BKF Bolt group $40
BCM upper
BCM MCMR 8"
BCM Gas block
BA MS 8" 300bo
Gas tube nitride
Blast can
$550 obo
Also available:
Radian raptor SL CH $100
BKF Bolt group $40


