Home > AR-15 > AR-15 Upper Assemblies > 12.7x42 .50 Cal. AR-15 Complete Upper Assemblies
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Radical Firearms 10.5" 12.7x42 Complete Upper with 9" FHR Radical Firearms 16" 12.7x42 Complete Upper with 15" FHR 10 rd 12.7x42/ 458 SOCOM Magazine
  • 10.5" 12.7 x 42 4140V Barrel With Melonite Coating
  • 1 in 20" Twist Rate
  • 49/64 x 20 TPI
  • 12.7 x 42 Chamber
  • Single Feed Ramp
  • .936" Gas Block
  • Stainless carbine-length gas tube
  • Direct Gas Impingement
  • Radical Firearms Panzer Brake
  • Radical Firearms FHR Hybrid Rail System
  • MIL-STD Forged Upper Receiver with RF Dimpled Forward Assist, Shell Deflector
  • Complete 12.7 BCG, Melonite Coated
  • MIL-STD Charging Handle
    • 16" 12.7 x 42 4140V Barrel With Melonite Coating
    • 1 in 20" Twist Rate
    • 49/64 x 20 TPI
    • 12.7 x 42 Chamber
    • Single Feed Ramp
    • .936" Gas Block
    • Stainless carbine-length gas tube
    • Direct Gas Impingement
    • Radical Firearms Panzer Brake
    • Radical Firearms 15" FHR Hybrid Rail System
    • MIL-STD Forged Upper Receiver with RF Dimpled Forward Assist, Shell Deflector
    • Complete 12.7 BCG, Melonite Coated
    • MIL-STD Charging Handle
    • High performance steel magazines.
    • Tested by special military forces and anti-terror units.
    • Fine resistance body coating, enduring up to 96 hours salt-spray test.
    • State-of-the-art anti-tilt self-levelingfollowers in several colors.
    • Improved reinforced floorplate

    Radical Firearms 10.5" 12.7x42 Complete Upper with 9" MHR Radical Firearms 16" 12.7x42 Complete Upper with 15" MHR
  • 10.5" 12.7 x 42 4140V Barrel With Melonite Coating
  • 1 in 20" Twist Rate
  • 49/64 x 20 TPI
  • 12.7 x 42 Chamber
  • Single Feed Ramp
  • .936" Gas Block
  • Stainless carbine-length gas tube
  • Direct Gas Impingement
  • Radical Firearms Panzer Brake
  • Radical Firearms 9" MHR Hybrid Rail System
  • Integrated M-LOK attachment points on the sides and bottom with Picatinny Rails at the fore end for Mounting Lights, Lasers, Bipods & Sights
  • MIL-STD Forged Upper Receiver with RF Dimpled Forward Assist, Shell Deflector
  • Complete 12.7 BCG, Melonite Coated
  • MIL-STD Charging Handle
  • Big Bore Magazine


  • *Does not include dust cover
  • 16" 12.7 x 42 4140V Barrel With Melonite Coating
  • 1 in 20" Twist Rate
  • 49/64 x 20 TPI
  • 12.7 x 42 Chamber
  • Single Feed Ramp
  • .936" Gas Block
  • Stainless carbine-length gas tube
  • Direct Gas Impingement
  • Radical Firearms Panzer Brake
  • Radical Firearms 15" MHR Hybrid Rail System
  • Integrated M-LOK attachment points on the sides and bottom with Picatinny Rails at the fore end for Mounting Lights, Lasers, Bipods & Sights
  • MIL-STD Forged Upper Receiver with RF Dimpled Forward Assist, Shell Deflector
  • Complete 12.7 BCG, Melonite Coated
  • MIL-STD Charging Handle
  • Big Bore Magazine


  • *Does not include dust cover