300 BO 16" GP 1:8 Carbine 4150 CrMoV, Nitride
The BCA AR-15 Complete Pistol Upper Assembly has a 16″ mid-weight barrel made of 4150 chrome moly vanadium steel with a black nitride finish, a 1:8 twist rate and a carbine length gas system. It is chambered in .300 blackout and machined with .300 blackout feed ramps in the barrel extension.
Match-quality 16” barrel feature Nitromet salt bath nitride to give them maximum wear resistance and durability that standard barrel finishes just can’t match. Barrel has a Nitromet nitrided bore treatment for longer life than chrome without affecting accuracy. Barrels are made of 4150 CrMoV, chambered for 300 AAC Blackout, button rifled with 1-8 twist rifling, and machined to a standard medium weight exterior profile.
- Nitromet coated
- 16" 1:8 Twist
- Government Profile, Carbine Length Gas System 4150
- Made in the USA