450 Bushmaster Heavy Barrel Upper with Mag


Out of stock

SKU: 91700 Category:


This drop-in A3 upper will mount to virtually any standard AR-15 mil-spec lower receiver.

This upper receiver assembly comes complete with a charging handle, forward assist, ejection port cover, bolt and bolt carrier assembly. The upper also features a versatile flat top for mounting optical devices or accessories. Includes a 5 round magazine. 

Technical Information 

  • Upper Receiver Type: A3 Flat-Top
  • Barrel Length: 16"
  • Barrel Material: Chrome Moly Steel
  • Muzzle Thread Pattern: 11/16"-24
  • Chrome Lined: Yes
  • Barrel Finish: Black Matte
  • Twist Rate: 1 in 24"
  • Chamber: 450 Bushmaster
  • Muzzle Device: Izzy Muzzle Brake
  • Gas System Length: Carbine
  • Handguard: Free Float
  • Sights: None
  • Bolt Carrier Assembly Included: Yes
  • Extras: 5-round magazine¬†

Additional information

Weight 5.5 lbs