Shop › CMMG BBL 300BLK 16.1" MT 416SS CMMG BBL 300BLK 16.1" MT 416SS $204.95 CMMG Barrel, 300 AAC Blackout, 16.1" Barrel, 1:7 Twist, Carbine 416 SS Bead Blasted Finish, 5/8"-24 TPI 30DC30A Quantity: Add To Cart Added! CMMG Barrel, 300 AAC Blackout, 16.1" Barrel, 1:7 Twist, Carbine 416 SS Bead Blasted Finish, 5/8"-24 TPI 30DC30A