The Radian Model 1 Complete Upper (brand part number R0045) is a fully assembled AR-15 upper receiver group chambered in .300 AAC Blackout with a 9-inch barrel, finished in Flat Dark Earth. Radian Weapons builds the Model 1 line around a machined aluminum receiver and a compact barrel length that suits short-barreled pistol builds and suppressed .300 Blackout setups where subsonic performance matters. As a complete upper, it drops onto a compatible AR-15 lower to add a ready-to-run, short-barrel 300 Blackout capability without sourcing a barrel, handguard, and bolt carrier group separately. This upper is sold without a lower receiver, so the buyer supplies the lower to complete the finished firearm.

Key Specifications

• Chambered in .300 AAC Blackout, a cartridge built for both supersonic carbine use and subsonic suppressed shooting.
• Barrel length is 9 inches, sized for compact pistol-length .300 Blackout builds.
• Finished in FDE (Flat Dark Earth) for a distinct, non-standard AR-15 appearance.
• Receiver is machined from aluminum for a durable, lightweight upper assembly.
• Sold as a complete upper assembly, ready to mate to a compatible AR-15 lower receiver.
• Built to standard AR-15 pattern compatibility for broad lower-receiver fitment.

Frequently Asked Questions

Does this upper come with a lower receiver? No, this is an upper receiver group only; the buyer supplies a compatible AR-15 lower to complete the firearm.

What finish and receiver material does this upper have? It is finished in Flat Dark Earth over a machined aluminum receiver.

What is .300 Blackout good for on a short barrel? The cartridge was designed to perform well out of short barrels, including retaining velocity for both supersonic loads and subsonic loads used with a suppressor.

Buy the Radian Model 1 Complete Upper

Order the Radian Model 1 complete upper in .300 Blackout from our Lubbock, Texas gun shop for fast, insured shipping. See the full lineup of Radian Weapons AR15 uppers to complete your build.