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Colt AR-15 Pistol Upper Receiver Assembly 5.56x45mm



Product Information

Cartridge 5.56x45mm NATO
Finish Black Parkerized
Material Aluminum
Style M4 Polymer
Barrel Length 14.5 Inches
Twist 1:7 Inches
Threads 1/2″-28
Barrel Contour M4
Sights Yes
Barrel Finish Black Parkerized
Chrome Lined Yes
Gas Block Diameter 0.75 Inches
Gas System Length Carbine
M4 Feed Ramps Yes
Upper Receiver Type A3 Flat-Top
Barrel Material Chrome Moly Vanadium Steel
Handguard M4 Style Polymer
Bolt Carrier Assembly Included Yes
Muzzle Device A2 Flash Hider
Mil-Spec or Commercial Mil-Spec
Compatible With

Delivery Information

Shipping Weight

4.875 Pounds

The Colt AR-15 Upper Receiver Assembly comes complete with Magpul adjustable flip-up rear sight, charging handle, bolt and bolt carrier assembly. The Colt AR-15 Upper Receiver also comes complete with A2 flash hider, M4 polymer handguard, and a barrel with a black parkerized finish. This Upper Receiver Assembly comes with a picatinny-style flattop rail for plenty of accessories, and is more than ready to offer maximum versatility.


  • Magpul Adjustable Flip-Up Rear Sight
  • A2 Flash Hider
  • M4 Polymer Handguard
  • Black Parkerized Barrel Finish



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