91702 : AR-15 A3 Upper Receiver Assembly 450 Bushmaster® 20" BBL
Add the hard-hitting punch of the 450 Bushmaster to your Bushmaster lower receiver instantly. AR-type gas operating system drastically reduces recoil for excellent second shot control. Aluminum forearm free-foats the barrel for optimum accuracy. Heavy barrel is hard chrome-lined in bore and chamber for exceptional durability and enhanced features. 1 in 24” twist rifing, optimized for the .450 bullet. Includes 5-round .450 specifc magazine.
- Built on the versatile Bushmaster modular AR upper platform
- Barreled upper receivers can be used on existing AR15-type lower receivers
- Bushmaster 4150 chrome-moly-vanadium steel barrels feature hard-chrome lining in
- both bore and chamber for extended barrel life
- All receivers feature integral brass defectors and hard anodized fnish
- Each assembly is factory headspaced, proofed, test-fred and ready to use
- Forged, lightweight 7075T6 aircraft-quality aluminum receivers incorporate all M16A2 design improvements including cartridge case defector, bolt catch assembly and raised ribs for protection against accidental magazine release
Due to governmental regulations, some items may be not be available to export in your country.
|Receivers||OLD-Upper Receiver Assembly|
|Note||11/16"-24 Muzzle thread|