RADICAL 10.5″ 5.56


The Radical Firearms 10.5″ M4 Profile 5.56mm AR Pistol uses MIL-STD Upper and lower receivers along with our 10″ RPR free float rail system for increased accuracy, keeping your hands cool, and giving you plenty of room for accessories. Starting in 2019 we are excited to be add the SB-Tactical SBA3 5 postion adjustable pistol brace line of pistols. Regardless if it’s your first or fiftieth, a Radical Firearms AR pistol will not disappoint!

2 in stock

SKU: FP10.5-5.56M4-10RPR-SBA3
UPC: 814034021999
MFR#: RF01289

  • Barrel Length: 10.5″
    Barrel Material: 4140 Chrome Moly Vanadium
    Barrel Finish: Melonite
    Barrel Profile: M4
    Barrel Thread Pitch: 1/2X28
    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: MIL-STD
    Dust Cover: MIL-STD
    Handguard Type: Free Float
    Handguard Style: M-Lok Thin Rail
    Handguard Length: 10″
    Charging Handle: MIL-STD
    Lower Receiver: Forged 7075 T6
    Lower Receiver Finish: Type III Anodizing
    Fire Control Group: MIL-STD
    Buffer Tube: Carbine Buffer Tube
    Pistol Brace: SB-TACTICAL SBA3
    Magazine: 5.56 30 Round


All NFA Rules Apply.

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

It is you, the customer’s responsibility for understanding state laws regarding magazine capacities. EC Defense abides by all state regulations regarding the sale of high capacity magazines. We DO NOT ship high-capacity magazines with firearms to certain states. We WILL NOT replace high capacity magazines with state compliant magazines. We DO NOT offer refunds in place of the magazines. Please see our terms and conditions for a list or restricted states.

It is the customer’s responsibility to be aware of all applicable laws and regulations regarding the purchase and ownership of uppers with a barrel length of less than 16″. Federal NFA regulations are applicable to this item.

Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).

Please review our Terms & Conditions page for a full list of restrictions

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