The Radical Firearms RF-15 is an AR-15-pattern pistol chambered in .300 AAC Blackout with a 10.5-inch barrel. It ships with an MFT Engage V2 pistol grip, a pistol tube (no stock), MLOK-compatible handguard, flash hider, and a 30-round magazine. The 1:8 twist rate handles both subsonic and supersonic .300 Blackout loads. 
 

Key Specifications 

• Manufacturer: Radical Firearms 
• Model: RF-15 
• Action: Semi-Automatic 
• Type: Pistol 
• Caliber: .300 AAC Blackout 
• Barrel Length: 10.5 inches 
• Color: Black 
• Grips: MFT Engage V2 
• Capacity: 30 rounds 
• Accessories: Flash Hider included 
• Barrel Twist Rate: 1:8 
• Rail System: MLOK compatible 
• Hand Orientation: Right Handed 
• Frame Material: Aluminum 
• Stock Type: Pistol Tube 
   

Features 

The MLOK handguard lets you mount lights, grips, or other accessories without adapters. The flash hider reduces visible muzzle signature, which matters when running supersonic loads in a short barrel. The 10.5-inch barrel in .300 Blackout gives good ballistics for the cartridge: the round was designed around short barrels and most of its velocity is achieved by 9 inches. The aluminum lower keeps weight reasonable for a pistol-configured AR. 
 

Usage 

This platform is suited for home defense, range use, and hog hunting within typical .300 Blackout distances. Subsonic loads with a suppressor (sold separately) are a common pairing. The 30-round capacity and semi-automatic action allow for sustained fire at the range. As a pistol-configuration AR it is not designed for traditional shoulder-fire without an appropriate brace.

Owners of the Radical RF-15 in .300 Blackout generally like the platform's versatility with the cartridge's subsonic and supersonic options. Cycling reliability across load types is frequently praised, and the MLOK system is well-regarded for how easily it accepts accessories.

Build quality is a more mixed topic. Some buyers are satisfied with the construction for the price, while others note finish quality and certain components as areas where Radical cuts costs compared to premium AR builders. This is a common trade-off at Radical's price point and most owners accept it.

Ergonomics are generally positive, with the MFT grip comfortable for most shooters. The compact pistol configuration handles well in tight spaces. Price is seen as competitive for a complete .300 Blackout pistol-AR, giving reasonable value compared to assembling a comparable build independently.

Community discussion tends to focus on suppressor pairings, ammunition selection for the 1:8 twist, and accessory setups on the MLOK rail.