Home > AR-15 > AR-15 Upper Assemblies > 5.56/223 AR-15 Upper Assemblies
Sort By:
Page of 1
RF 16" 5.56MM M4 15" FTR Upper Assembly RF 16" 5.56M SOCOM Barrel with 15" FTR Upper Assembly RF 16" 5.56MM M4 15" FCR Upper Assembly
  • 16" M4 Melonite Barrel
  • 4150V Chrome Moly
  • 1 in 7" twist rate
  • HPT/MPI
  • 5.56 NATO Chamber
  • M4 Feed ramps
  • Low Profile Micro Gas Block
  • Stainless Carbine-length gas tube
  • Direct Gas Impingement
  • Mil-Spec A2 Flash Hider
  • 15" Radical Firearms First-Gen Thin Rail
  • Integral Keymod and Picatinny Top Rail for Mounting Lights, Lasers, Bipods & Sights
  • Forged Upper Receiver with Forward Assist, Shell Deflector
  • Made in Houston, Texas U.S.A.!
  • 16" SOCOM Melonite Barrel
  • 4150V Chrome Moly
  • 1 in 7" twist rate
  • HPT/MPI
  • 5.56 NATO Chamber
  • M4 Feed ramps
  • Low Profile Micro Gas Block
  • Stainless Carbine-length gas tube
  • Direct Gas Impingement
  • Mil-Spec A2 Flash Hider
  • 15" Radical Firearms First-Gen Thin Rail
  • Integral Keymod and Picatinny Top Rail for Mounting Lights, Lasers, Bipods & Sights
  • Forged Upper Receiver with Forward Assist, Shell Deflector
  • Made in Houston, Texas U.S.A.!
  • 16" M4 Melonite Barrel
  • 4150V Chrome Moly
  • 1 in 7" twist rate
  • HPT/MPI
  • 5.56 NATO Chamber
  • M4 Feed ramps
  • Low Profile Micro Gas Block
  • Stainless Carbine-length gas tube
  • Direct Gas Impingement
  • Mil-Spec A2 Flash Hider
  • 15" Radical Firearms M-LOK FCR
  • Slim and Light Weight Design
  • Integral M-LOK slots for at the 3-6 and 9'o clock positions and full length Picatinny Top Rail
  • Forged Upper Receiver with Forward Assist, Shell Deflector
  • Made in Houston, Texas U.S.A.!
RF 16" 5.56MM M4 12" FCR Upper Assembly Radical Firearms 7.5" 1:7 5.56 M4 Profile FGS 7" Radical Firearms 7.5" 1:7 5.56 M4 Quad Rail: 7" FQR
  • 16" M4 Melonite Barrel
  • 4150V Chrome Moly
  • 1 in 7" twist rate
  • HPT/MPI
  • 5.56 NATO Chamber
  • M4 Feed ramps
  • Low Profile Micro Gas Block
  • Stainless Carbine-length gas tube
  • Direct Gas Impingement
  • Mil-Spec A2 Flash Hider
  • 12" Radical Firearms M-LOK FCR
  • Slim and Light Weight Design
  • Integral M-LOK slots for at the 3-6 and 9'o clock positions and full length Picatinny Top Rail
  • Forged Upper Receiver with Forward Assist, Shell Deflector
  • Made in Houston, Texas U.S.A.!
  • 7.5" M4 Melonite Barrel
  • 4150V Chrome Moly 1 in 7" twist rate
  • 5.56 Nato Chamber
  • HPT/MPI
  • M4 Feed ramps
  • Low Profile Micro Gas Block
  • Stainless pistol-length gas tube
  • Direct Gas Impingement
  • Mil-spec A2 Flash Hider
  • Radical Firearms Free Float 7" FGS (Round Rail)
  • Forged Upper Receiver with Forward Assist, Ejection Door and Shell Deflector
  • Made in Houston, Texas U.S.A.!
  • 7.5" M4 Melonite Barrel
  • 4150V Chrome Moly 1 in 7" twist rate
  • 5.56 Nato Chamber
  • HPT/MPI
  • M4 Feed ramps
  • Low Profile Micro Gas Block
  • Stainless pistol-length gas tube
  • Direct Gas Impingement
  • Mil-spec A2 Flash Hider
  • Radical Firearms Free Float 7" FQR (First-Gen Quad Rail)
  • Forged Upper Receiver with Forward Assist, Ejection Door and Shell Deflector
  • Made in Houston, Texas U.S.A.!
  • RF Upper 10.5"  5.56 M4 Profile RF Round Rail: FGS 10" rail RF Upper 10.5"  5.56 m4 profile RF Quad Rail: FQR 10" rail RF Upper 16"  5.56 M4 Profile RF Round Rail: FGS 12" Rail
  • 10.5" 4140V Chromoly Barrel With Melonite Coating

  • 1 in 7" twist rate

  • 5.56 NATO Chamber

  • M4 Feed Ramps

  • Low Profile Gas Block

  • Carbine Length Gas System

  • M16 BCG With Melonite Coating

  • Radical Firearms 10" Free Float FGS (Forward Guard Shield) Round Rail with Top Picatinny Rail

  • Allows for the use of Magpul MOE attachments and our FGSA rail attachments

  • MIL-STD Forged Upper Receiver with RF Dimpled Forward Assist, Shell Deflector, Dust Cover

  • Made in Houston, Texas U.S.A.!


    • 10.5" 4140V Chromoly Barrel With Melonite Coating

    • 1 in 7" twist rate

    • 5.56 NATO Chamber

    • M4 Feed Ramps

    • Low Profile Gas Block

    • Carbine Length Gas System

    • M16 BCG With Melonite Coating

    • Radical Firearms 10" Free Float FQR (First-Gen Quad Rail)

    • Quad Picatinny Rails for Mounting Lights, Lasers, Bipods & Sights

    • MIL-STD Forged Upper Receiver with RF Dimpled Forward Assist, Shell Deflector, Dust Cover


    • Made in Houston, Texas U.S.A.!

    • 16" M4 Melonite Barrel
    • 4150V Chrome Moly
    • 1 in 7" twist
    • HPT/MPI
    • 5.56 NATO Chamber
    • M4 Feed ramps
    • Low Profile Micro Gas Block
    • DGI Stainless Carbine-length gas tube
    • Direct Gas Impingement
    • Mil-Spec A2 Flash Hider
    • 12" Radical Firearms Billet FGS (Forward Guard Shield) Round Rail
    • Top Picatinny Rail
    • Allows for the use of Magpul MOE attachments
    • Forged Upper Receiver with Forward Assist, Shell Deflector
    • Made in Houston, Texas U.S.A.!
    RF Upper 16"  5.56 M4 profile RF Quad Rail: FQR 12" rail RF 10.5" M4 5.56MM Radical Rail Upper Assembly RF 16" 5.56MM SOCOM Radical Rail Upper Assembly
    • 16" M4 Melonite Barrel
    • 4150V Chrome Moly
    • 1 in 7" twist rate
    • HPT/MPI
    • 5.56 NATO Chamber
    • M4 Feed ramps
    • Low Profile Micro Gas Block
    • DGI Stainless Carbine-length gas tube
    • Direct Gas Impingement
    • Mil-Spec A2 Flash Hider
    • 12" Radical Firearms Billet FQR (First-Gen Quad Rail)
    • Integral Keymod and Picatinny Rail for Mounting Lights, Lasers, Bipods & Sights
    • Forged Upper Receiver with Forward Assist, Shell Deflector
    • Made in Houston, Texas U.S.A.!
    • 10.5" M4 Melonite Barrel
    • 4150V Chrome Moly
    • 1 in 7" twist rate
    • HPT/MPI
    • 5.56 NATO Chamber
    • M4 Feed ramps
    • Low Profile Micro Gas Block
    • DGI Stainless Carbine-length gas tube
    • Direct Gas Impingement
    • Mil-Spec A2 Flash Hider
    • Radical Firearms 9" Hybrid Keymod Handguard
    • Integral Keymod and Picatinny Rail for Mounting Lights, Lasers, Bipods & Sights
    • Forged Upper Receiver with Forward Assist, Shell Deflector
    • Made in Houston, Texas U.S.A.!
    • 16" SOCOM Melonite Barrel
    • 4150V Chrome Moly
    • 1 in 7" twist rate
    • HPT/MPI
    • 5.56 NATO Chamber
    • M4 Feed ramps
    • Low Profile Micro Gas Block
    • DGI Stainless Mid-length gas tube
    • Direct Gas Impingement
    • Mil-Spec A2 Flash Hider
    • Radical Firearms Hybrid Keymod Handguard
    • Integral Keymod and Picatinny Rail for Mounting Lights, Lasers, Bipods & Sights
    • Forged Upper Receiver with Forward Assist, Shell Deflector
    • Made in Houston, Texas U.S.A.!
    RF 7.5" M4 1:7 5.56MM Radical Rail Upper Assembly
    • 7.5" M4 Melonite Barrel
    • 4150V Chrome Moly
    • 1 in 7" 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
    • Radical Firearms 7" Hybrid Keymod Handguard
    • Integral Keymod and Picatinny Rail for Mounting Lights, Lasers, Bipods & Sights
    • Forged Upper Receiver with Forward Assist, Shell Deflector
    • Made in Houston, Texas U.S.A.!