300 BO 16" GP 1:8 Carbine 4150 CrMoV, Nitride
300 BO 16" GP 1:8 Carbine 4150 CrMoV, Nitride, 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.