CMMG AR-15 M4 Flat-Top Upper Assembly 5.56x45mm NATO 1 in 7" Twist 14.5" Barrel Carbine Gas System Chrome Moly Matte with M4 Handguard, A2 Front sight, Permanent Flash Hider

Product #: 373133 CMMG #: 55B9C96 UPC #: 815835012971
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  • Information
This complete CMMG AR-15 M4 Upper Assembly features a chrome-lined steel barrel with a permanently attached flash hider. M4 feed ramps ensure reliable feeding and the 5.56x45mm NATO chamber allows the use of both commercial or surplus mil-spec ammunition.

Technical Information:
  • Upper Receiver: A3 Flat-Top
  • Barrel Length: 14.5"
  • Barrel Contour: M4
  • Barrel Material: Chrome Moly Steel
  • Chrome Lined: Yes
  • Barrel Finish: Parkerized
  • Twist Rate: 1 in 7"
  • Chamber: 5.56x45mm NATO
  • M4 Feed Ramps: Yes
  • Muzzle Device: Permanently attached Phantom Flash Hider
  • Gas System Length: Carbine
  • Gas Block Diameter: 0.750"
  • Handguard: Polymer M4-Style
  • Sights: Mil Spec A2 "F" Marked Front, No Rear

NOTE: All CMMG uppers are test fired at their facility before shipment to the end user.

Please Note: Installation of AR-15 upper assemblies with certain features including, but not limited to: flash hiders, bayonet lugs, and threaded muzzles may violate state and/or local laws.

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