In stock (can be backordered)
The Radical Firearms M4 Upper Receiver is a flat top, law-enforcement grade, drop in receiver, ready to be mounted to any MIL-STD AR-15 lower receiver! This fully MIL-STD compliant receiver provides a high-quality upper for any level budget or shooter. Comes complete and assembled with Upper Receiver, Forward Assist, Ejection Port Door, Barrel Nut. 10.5″ M4 Profile Barrel and A2 Flash Hider. Bolt Carrier Group and Charging Handle are not included.
- 10.5” 4140 Chromoly Barrel With Melonite Coating
- 5.56 M4 Profile
- M4 Feed Ramps
- 1:7 Twist Rate
- A2 Flash Hider
- 1/2×28 TPI
- Low Profile Gas Block
- Carbine Length Gas System
- Radical Firearms Forged MIL-STD Upper Receiver
- MIL-STD Upper Parts Kit
- RF Dimpled Forward Assist
- Radical Firearms 10” FCR with M-LOK
- Made in Houston, Texas U.S.A.!