DealGreen Mountain 7.6239 barrels are made to M4 profile with a carbine length gas port, a chrome-lined bore, a durable phosphate finish, and above all great value. Length: 16 Material: 4150 steel Twist rate: 1:10 Finish: Manganese phosphate, chrome-lined bore Muzzle threads: 5/824 from Nordic Components (Product BBL-16C-76239-BLK) |