MSBRG 450 BUSHMASTER MUZZLE DEVICE

Description

The Mossberg 450 Bushmaster muzzle brake is a factory replacement and upgrade option designed to make the 450 Bushmaster’s substantial recoil more manageable during extended range sessions or follow-up shots in the field. The 450 Bushmaster generates considerably more impulse than a standard AR-pattern cartridge, and a properly ported muzzle device addresses that directly by venting propellant gas upward and to the sides at the moment the bullet exits, counteracting muzzle rise before it pulls the shooter off target.

This device uses an 11/16-24 UNEF thread pitch, which is the correct specification for 450 Bushmaster barrels rather than the 1/2-28 or 5/8-24 threads common on smaller-bore AR platforms. Using a brake threaded specifically to this standard ensures full, concentric engagement with the muzzle crown and consistent positioning of the ports relative to the bore — both of which matter for the device to function as designed. Because it comes from Mossberg directly, fitment on any 450 Bushmaster model built to factory specifications requires no timing rings or gunsmithing beyond torquing to spec. The black finish is consistent with factory rifle aesthetics. If you are running a 450 Bushmaster for hunting in heavy cover or dense timber where shots can come quickly and at close range, reducing muzzle flip between shots has a practical effect on how fast you can reacquire a target.