The Radical Firearms 16" M4 Upper Receiver is a flat top, law-enforcement grade, drop in receiver, ready to be mounted to your Mil-Spec AR-15 lower receiver. This fully mil-spec compliant receiver provides a high-quality upper for any level budget or shooter. It comes complete and assembled with upper receiver, forward assist, ejection port door, and barrel nut.
The free-float handguard Forward Guard Shield (FGS) keeps your hands cool and provides plenty of room for accessories. The FGS rail even has the capability to add attachments other than on the top picatinny rail, as it does allow Magpul Moe attachments and rail sections.
Type: Complete Gas Impingement
Caliber: 223 Remington/5.56 NATO
Sights: None, Optic Ready
Barrel Length: 16 inches
Barrel Material: 4150 Chrome Moly Vanadium Steel
Twist: 1:7"
Barrel Description: M4 Profile
Barrel Finish: Black
Receiver Description: 7075-T6 Aluminum M4
Receiver Finish: Black
Handguards: 12" FHR
Handguard Finish: Black Hard Coat Anodized
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