MPN: R0027 / R0445 / R0446


  • Caliber: .300 Blackout
  • Finish: Radian Black, Flat Dark Earth, or Radian OD
  • Upper Receiver: Billet Machined 7075-T6 Upper Receiver
  • Handguard: Proprietary Extended Aluminum M-LOK Handguard and Integrated Upper/Handguard Stainless Steel Anti-Rotation Pin
  • M4 Feed Ramps: Yes, Polished Crown and Feed Ramps
  • Muzzle Device: Dead Air Flash Hider (Pin and weld ready)
  • Barrel: 9" 1:7 Match Grade 416R Stainless Steel Barrel
  • Muzzle Thread Pattern: 5/8"-24 TPI
  • Gas Block: .750" Low-Profile Gas Block
  • Gas Tube: Pistol-Length Gas Tube
  • Bolt Carrier Group: Radian Enhanced Black Nitride M16 Bolt Carrier Group
  • Charging Handle: Radian Raptor-SD Suppressor-Optimized Ambidextrous Charging Handle

*This upper receiver assembly has a barrel that is shorter than 16". This upper is only for use on AR pistol lower receivers and NFA-registered Short-Barreled Rifle (SBR) lower receivers. All NFA laws apply!


  • Weight: ~3.7 lbs.
  • Length: ~18.31"


  • AR-15 lower receiver


  • 1x Radian Model 1 Complete Upper (9-Inch Barrel .300 Blackout)
  • 1x Radian Raptor-SD Suppressor-Optimized Ambidextrous Charging Handle
  • 1x Radian Enhanced Black Nitride M16 Bolt Carrier Group

Radian complete uppers chart


.300 Blackout is a very capable round with a heavier projectile that is extremely effective for those who use AR-15s for hunting big games at shorter ranges. It also has all the stopping power you need for a self-defense caliber. If you would like to build an AR-15 chambered in .300 Blackout, you should check out the Radian Model 1 Complete Upper (9-inch Barrel .300 Blackout). It includes an upper receiver, a bolt carrier group, a charging handle, a gas system, a handguard, and a barrel that are all made to work together to provide an accurate, reliable, and smooth-shooting rifle.

This .300 Blackout 9-inch Barrel Is as Accurate as It Gets

The Radian Model 1 Complete Upper (9-inch Barrel .300 Blackout) is made with both accuracy and performance in mind. It has a match-grade 416R stainless steel barrel with a polished crown and feed ramps for reliability and precision. It can easily get sub-MOA accuracy when you utilize it in tandem with match-grade ammunition.

The barrel included in this complete upper also has a Dead Air Flash Hider on it and a 5/8"-24 thread pitch that will enable you to install almost any muzzle device you want on your weapon. This upper receiver comes with the Radian Raptor-SD ambidextrous charging handle as well, which is suppressor-optimized.

Optimized Gas System

The Radian .300 Blackout Upper features an optimized gas system that works well with the .300 Blackout caliber and the small 9-inch barrel. It has a low-profile gas block and a pistol-length gas tube, which will help turn your short and capable firearm into the perfect solution for those interested in using it for self-defense purposes.

Modern and Modular

The Radian Model 1 Complete Upper (9-inch Barrel .300 Blackout) comes with an M-LOK handguard that will allow you to mount all kinds of accessories to your rifle to increase its capabilities and effectiveness. It has M-LOK slots on both sides and the bottom and features a full-length Picatinny rail on top.

The handguard on this upper is durable, thanks to the materials used to make it. It’s manufactured using lightweight but strong aluminum, and it’s mounted on the receiver with a solid stainless steel anti-rotation pin to keep it in place. You won’t have to worry about the handguard on your AR-15 moving when you fire it, and the accessories mounted on it will always maintain the same positions.

Long-Lasting Design

The Radian Model 1 Complete Upper (9-inch Barrel .300 Blackout) is made from billet machined 7075-T6 aluminum, and it has a Radian Black finish. Additionally, it has a port cover and a lightweight forward assist. This upper receiver also features M4 feed ramps to ensure reliable ammunition feeding, as well as a Radian Enhanced Black Nitride M16 Bolt Carrier Group for reliable and smooth operation.

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