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Bushmaster Complete Upper 16” M4A3 5.56 NATO
Bushmaster Complete Upper 16” M4A3 5.56 NATO
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Our Price
Manufacturer Part Number: 91823

Quantity in Stock :24


  • 5.56MM NATO/.223 Remington
  • Built on the versatile Bushmaster modular MSR upper platform
  • Barreled upper receivers can be used on existing MSR-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 deflectors and hard anodized finish
  • Each assembly is factory headspaced, proofed, test fired and ready to use

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