92866 : XM15 AR-15 A3 Upper Receiver Assembly 300 AAC Blackout® 16" M4 BBL


A 16” M4 contour barrel, low-profle milled gas block, four-rail rife length, free-foat tube, AAC Blackout® muzzle break.

  • 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 7075 T6 aircraft-quality aluminum receivers incorporate all M16 A2 design improvements including cartridge case defector, bolt catch assembly and raised ribs for protection against accidental magazine release
More Information
Compatibility AR15 / M4 / M16
Actions & Receivers Upper Receiver Assembly/Complete
Note Muzzle thread 5/8"-24
Manufacturer Number 92866
UPC 604206928665
SKU 142382
Brand Bushmaster®
Color Black
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