Upper, 223REM/556NATO, Black Finish, Dust Cover, Forward Assist, M4 Feed Ramps SP63528
Specifications for Colt 223 Rem/ 556 NATO M4 Feed Ramps Upper:
- Colt Mil Spec
- Cage code marking, M4 marking on the front face of the rail above the barrel extention threads
- Expensive, hard to find
- Inside is lackluster. Perhaps evidence of Colt's recent struggle in the market?