Radical Firearms FR20 AR-15, Semi-automatic, .450 Bushmaster, 20" Barrel, 7+1 Rounds

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Key Features

  • .450 Bushmaster
  • 7+1 rounds
  • 20" HBAR barrel
  • Adaptive Tactical EX adjustable stock
  • 15" MHR free-float rail with M-LOK® slots
  • Panzer Brake muzzle device
  • Includes (1) 7-rd. magazine

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Radical Firearms® FR20 .450 Bushmaster Semi-automatic AR Rifle

Nicknamed the "thumper," the .450 Bushmaster round pushes a 250-grain projectile at 2,200 FPS. With 2,800 foot-pounds of muzzle energy, it delivers devastating knockdown power for everything from feral hogs to bear and elk. The Radical Firearms FR20 puts the .450 Bushmaster to work in a highly modular, highly adaptable AR-style Rifle…and the results are outstanding.

The FR20 is a fully mil-spec AR built around forged MIL-STD upper and lower receivers. It comes complete with a 4140 CmV steel heavy barrel that delivers outstanding accuracy that maximized the ballistic performance of the .450 Bushmaster round. The barrel comes topped with Radical's own Panzer Brake, which directs the gas forward to help counteract recoil. The FR20 features a free-float 15" MHR (M-LOK Hybrid Rail) that has a full-length picatinny top rail and readily accepts M-LOK attachments. If you want to add some muscle to your gun safe, look no further.

More on Radical Firearms

Based in Stafford, Texas, Radical Firearms produces almost every rifle component in-house—meaning they don't have to pay a mark-up for the long list of essential parts. That means they can offer a much higher-quality AR than any other manufacturer in this price range.

  • 20" CmV steel heavy barrel delivers superior accuracy
  • Melonite barrel coating provides outstanding corrosion resistance
  • Adaptive Tactical EX adjustable stock
  • 15" MHR free-float rail with M-LOK slots for easy accessory attachment
  • Panzer Brake muzzle device helps mitigate felt recoil
  • Oversized ejection port for reliable cycling
  • Includes (1) 7-rd. magazine

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Key Specifications

  • Item Number: 717553
  • Caliber: .450 Bushmaster
  • Action: Semi-automatic (direct impingement)
  • Gas System: Rifle-length
  • Capacity: 7+1
  • Barrel Length: 20" HBAR-profile
  • Barrel Material: 4140 chrome moly vanadium steel, Melonite-coated
  • Barrel Twist: 1:14" twist
  • Stock: Adaptive Tactical EX adjustable stock
  • Upper Receiver: M4 mil-std 7075-T6 forged, Type III anodized
  • Lower Receiver: 7075-T6 forged, Type III anodized
  • Pistol Grip: Mission First Tactical
  • Sights (front/rear): Optics-ready
  • Fire Control: Standard AR-15
  • Handguard: 15" MHR with M-LOK slots
  • Flash hider: Panzer Brake
  • Mfg. Number: FR20-450BUSH-15MHR
  • UPC: 816903027330