NOTE: Does not include a bolt carrier group or charging handle.
The BCM 16″ 300 BLK 1:7 Tapered Contour Barreled AR-15 Upper – 15″ KeyMod KMR Alpha is a top quality weapon designed for professionals. This barreled upper receiver is crafted from 41V50 chrome moly vanadium steel, a MIL-SPEC material that is stronger and more durable than most commercial options. The BCM KMR ALPHA handguards are made from 100% aluminum and hardcoat anodized for a corrosion resistant, anti-reflective finish. They feature KeyMod mounting slots on seven sides plus a continuous Picatinny rail, providing ample space for all your favorite accessories.
Notice from the manufacturer:
“BCM has taken great care to ensure the best possible performance and interchangeability. However, due to the large operational range of 300 Blackout ammunition in the market place, BCM cannot guarantee function will all ammunition types in all conditions. These barrels were designed to run with a carbine buffer with subsonic ammo and a H3 buffer with high velocity ammo. Fine tuning may be required in limited instances based on ammo and buffer choices that work best for the desired application. BCM also recommends running the Crane O-ring (provided with all BCM Bolt Carrier Groups) over the extractor with 300 Blackout.”AA Bla