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The Radical Firearms 7.5 in. 5.56 M4 Upper Assembly is designed to fit Mil-spec AR15 lower receivers. There is no guarantee it will fit an 80% lower due to variations between different 80% builds.
Flawless function as usual from Radical. The reverse keymod on such a short rail can be an issue with some accessories though. Great upper for pistol build on a budget. Will look for Radical Firearms for future builds.
Comes beautifully shipped and even better unwrapped. Quality is top notch ,fit is snug. Not the biggest fan of hybrid rails but this one works well. Everything seemlessly flows together. I would definitely recommend this to anyone doing a pistol buil...
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Product Info for Radical Firearms 7.5 in. 5.56 M4 Upper Assembly
The Radical Firearms 7.5 inch 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, Barrel Nut. 7.5 inch M4 Profile Barrel and A2 Flash Hider. Bolt Carrier Group and Charging Handle are additional. 7.5 inch M4 Melonite Barrel. 4150V Chrome Moly. 1 in 7 inch twist rate. HPT/MPI. 5.56 NATO Chamber. M4 Feed ramps. Low Profile Micro Gas Block. DGI Stainless Pistol-length gas tube. Direct Gas Impingement. Mil-Spec A2 Flash Hider. 7 inch Radical Firearms Hybrid Keymod Handguard. Integral Keymod and Picatinny Rail for Mounting Lights, Lasers, Bipods & Sights. Forged Upper Receiver with Forward Assist, Shell Deflector.
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