Bones’ Pro Shop Criterion 16” Rifle Gas Upper (Geissele Black)

BCM Upper Receiver
Criterion 16 inch Hybrid Rifle Gas Length Barrel
Unrivaled Technologies Ultralight Bolt carrier with Headspaced BCM Bolt
Superlative Arms Bleed Off Adjustable gas block w/melanite blk gas tube
Geissele MK16 Rail (BLK)
Unrivaled Technologies UB 5.56 tunable Muzzle Brake
Radian LT Charging handle (BLK)

Will not operate with standard buffer system. Will require a lightweight buffer to function correctly