American Tactical Imports Uppers Gun Parts
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1 week ago
Nicknamed the "thumper," the .450 Bushmaster round pushes a 250-grain projectile at 2,200 FPS. With 2,800 foot-pounds of muzzle energy, it delivers delivers devastating knockdown power for big game and more. Even better, the .450 Bushmaster works with standard AR-15/M4 lowers and magazines (provided you replace the mag follower). This Complete Barreled Upper puts the .450 Bushmaster to work in a highly modular, highly adaptable AR-style Rifle. Features include a 16" nitrided barrel with the optimal 1:24" twist for the .450 Bushmaster round, as well as a free-floated KeyMod handguard.