(1 customer review)


In stock (can be backordered)

SKU: FU10.5-5.56M4-10FTR Category:


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 additional and are available in our store.

  • Barrel Length: 10.5″
  • Barrel Material: 4140 Chromoly Barrel
  • Barrel Finish: Melonite Coating
  • Barrel Profile: Medium Contour
  • Barrel Thread Pitch: 1/2×28
  • Chamber: 5.56mm
  • Twist Rate: 1:7
  • Barrel Extension: M4 Feed Ramps
  • Gas System: Carbine Length
  • Gas Block Type: .750 Low Profile Gas Block
  • Muzzle Device: A2 Flash Hider
  • Upper Receiver Material: Forged 7075 T6
  • Upper Receiver Style: M4 Mil-STD
  • Upper Receiver Finish: Type III Anodizing
  • Forward Assist: Billet Dimpled
  • Dust Cover: MIL-STD
  • Handguard Type: Free Float
  • Handguard Style: Keymod
  • Handguard Length: 10″
  • Made in Houston, Texas U.S.A.!


** CANCELLATIONS – Upper Assembly cancellations are subject to a 10% cancellation fee.

Additional information

Weight 4.5.0 lbs

1 review for RF 10.5″ 5.56 UPPER WITH 10″ FTR – BY RADICAL FIREARMS

  1. Adam (verified owner)

    Great product would recommend to anyone

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