Radical Firearms .300 BLK Heavy Barreled Upper - RPR Handguard - 16"

Manufactured by Radical Firearms
Manufactured by Radical Firearms
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Standard orders will ship out same day if ordered by 3:30pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.



NOTE: This barreled upper does not include a bolt carrier group or charging handle.

The Radical Firearms 16" .300 BLK Heavy Barreled Upper Receiver is a MIL-STD drop-in solution for your next AR build. This MIL-STD barreled upper receiver provides an outstanding solution for any budget with its quality material craftsmanship and Radical's lifetime warranty. This 16" 300BLK HBAR Barreled Upper includes a 15" RPR free float rail system that'll keep your hands cool while increasing accuracy. Complete the build with your favorite lower receiver, charging handle, bolt carrier group, and sights, then head for the range.

  • Chambered in 300BLK with 1:8 twist rate
  • 16" 4140 chrome moly vanadium steel HBAR barrel with Melonite finish
  • 5/8x24 thread pitch - A2 flash hider
  • 15" free float RPR M-LOK handguard
  • Pistol length gas system
  • Forged 7075-T6 aluminum material with type III anodizing
  • M4 MIL-STD receiver style
  • M4 Feed ramp
  • .750 low-profile gas block
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AssemblyBarreled Assemblies
Barrel CoatingMelonite
Barrel ContourHBAR
Barrel Length16
Barrel Material4140 Chrome Moly Steel
BrandRadical Firearms
Caliber Gauge300 Blackout
Gas System LengthPistol
Thread Pattern5/8 X 24
Twist Rate1:8

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