Complete Left Hand ejecting AR-15 upper.
Complete ready to fire upper with your choice of barrels, 12″ mid-weight, 16″ light weight, 16″ mid-weight, or 18″ light weigt. The standard upper with no options includes a complete bolt carrier group, charging handle, mid-length plastic GI hand guards, and Tromix muzzle brake. Many other options available. Barrel muzzle is threaded 11/16-24 with a twist of 1:24. This upper with an 18″ light weigit barrel on a standard M4 style lower will result in a complete rifle weight of 6.1 pounds.
Pic shown includes optional 15″ Midwest Industries CRM M-Lok hand guard (+$175) and optional radial compensator (+$30)
**********All complete Tromix 450 Bushmaster uppers are test fired with Steinel ammuntion (www.Steinelammo.com) prior to shipping. **********