If you experience feeding problems with your upper, 99% of the time, the issue is due to the customer using a sub-standard bolt from an alternate manufacturer. The construction of the bolt, extractor, and ejector are all extremely important for proper feeding of the 450 Bushmaster cartridge.
Includes complete ready-to-install barrel made from 4150 Carbon Steel.
Barrels are available in 16.25″ and 18″ black finish only.
Mid-Weight barrel profile is .900″ under the hand guards, .875″ at the gas block, and .800″ at the muzzle. 1:24 twist with the muzzle threaded 11/16-24.
Light-Weight barrel profile is 790″ under the hand guards, .750″ at the gas block, and .730″ at the muzzle. 1:24 twist with the muzzle threaded 11/16-24
16″ Barrels use a carbine length gas system.
18″ Barrels use a mid-length gas system.
16.25″ mid-weight barrel weighs 1.97 pounds
16.25″ light-weight barrel weights 1.52 pounds
18″ light-weight barrel weighs 1.70 pounds