Colt Upper Receiver M4 5.56 NATO 11.5". A complete Colt upper receiver for AR15 builds at home. This receiver features a 11.5" chrome-lined barrel with a 1:7" twist. The direct gas impingement upper includes a M4 full-auto bolt carrier assembly, ejection port cover, and charging handle. Also featuring an A2 flash hider, adjustable front sight, and rear flip-up sight. This is a great option for the next AR 15 build you want to do yourself.
  • Model: LE6933CK
  • UPC: 098289035349
  • 5.56 NATO
  • 11.5" chrome lined barrel
  • 1:7" twist
  • Direct gas impingement
  • Complete M4 full-auto bolt carrier assembly
  • Charging handle
  • Ejection port cover
  • A2 Style flash hider
  • Adjustable front sight
  • Flip up rear sight