5.56 Upper Assemblies

SPECIFICATIONS:

  • 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
Order Number
Description
91822
16" M4A3 Patrolman's Carbine Upper Assembly

SPECIFICATIONS:

  • 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
Order Number
Description
91823
16" M4 A3 XM-15 Pre Ban Flat Top Upper Assembly

SPECIFICATIONS:

  • 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
Order Number
Description
92194
16" ORC M4 Upper Assembly

SPECIFICATIONS:

  • 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
Order Number
Description
92450
Predator ORC 20" Fluted Barrel 223 Cal. Upper Assembly

SPECIFICATIONS:

  • 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
Order Number
Description
92820
Varminter ORC 24" Fluted Barrel 223 Cal. Upper Assembly