.450 Bushmaster Complete Assembled Upper – Right Handed



Ejection Port Cover

Upgrade Handguard (Optional)

Upgrade Muzzle Devise (Optional)

Charging Handle


SKU: 450-CAU-RH Categories: ,


Complete ready to fire upper, with your choice of a 12″ barrel, 16″ light weight barrel, 16″ mid-weight barrel, or 18″ light weight twist barrel.  Includes complete bolt carrier group, charging handle, mid-length GI plastic hand guards, and Tromix muzzle brake. Barrel muzzle is threaded 11/16-24, barrel twist is 1:24, chromoly steel. This upper on a standard M4 style lower will result in a complete rifle weight of 6.1 pounds with the 18″ light weight barrel installed.