Bushmaster Is Proud to Offer a New Line of .450 Bushmaster AR-15 Complete Upper Assemblies

Bushmaster is the name you know and trust when it comes to the modern sporting rifle platform. This complete upper assembly will fit virtually any AR-15 lower receiver and bring you the power to drop large north American game with great ease. Chambered in the ultra powerful .450 Bushmaster and known as "The Thumper" you can expect exceptional performance. You should expect the cartridge to perform well out to about 200 yards while the recoil impulse will be similar to that of a 20 gauge shotgun. Additionally the upper receiver is made from forged aluminum and futures a flat top design. Moreover this upper comes complete with a bolt carrier group, charging handle, muzzle device, and free float aluminum forend. Please note that a 5 round magazine is included.

Bushmaster AR-15 Complete Upper Assembly (Matte Black) Specifications and Features:

• Bushmaster 91700
• .450 Bushmaster
• 16" Barrel
• 1:24" Twist Rate
• Aluminum Free Float Forend
• Hard Chrome Lined Bore and Chamber
• Optimized for .450 Bullet
• Dust Cover
• Forward Assist
• Muzzle Device
• Low Profile Gas Block
• Mil-Spec Forged Aluminum Upper Receiver
• Mil-Spec Hard Coat Anodized Finish
• Matte Black

Includes:

• One 5 Round (.450 Bushmaster AR-15) Magazine
• Complete Bolt Carrier Group

NOTE: This item is oversized or heavy and is subject to a "Bulk Fee". The fee will be added to your cart at checkout.