In stock (can be backordered)
** PLEASE ALLOW A TWO WEEK “BUILD TO SHIP” TIME FROM THE DATE YOU PLACE YOUR ORDER.
The Radical Firearms 16″ M4 Upper Receiver is a flat top, law-enforcement grade, drop in receiver, ready to be mounted to any Mil-Spec AR-15 lower receiver! This fully mil-spec 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, RF Barrel Nut. 16″ HBAR Barrel and A2 Flash Hider.
**Bolt Carrier Group and Charging Handle are additional and are also available for purchase on our site.
- 16″ HBAR Melonite Barrel
- 4150V Chrome Moly
- 1 in 8″ twist rate
- AAC 300 BLACK OUT
- M4 Feed ramps
- Low Profile Micro Gas Block
- DGI Stainless Pistol-length gas tube
- Direct Gas Impingement
- Mil-Spec A2 Flash Hider
- 12″ Radical Firearms Billet FQR (First-Gen Quad Rail)
- Quad Picatinny Rails for Mounting Lights, Lasers, Bipods & Sights
- Forged Upper Receiver with Forward Assist, Shell Deflector
** CANCELLATIONS – Upper Assembly cancellations are subject to a 10% cancellation fee.
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