The Radical Firearms RF-15 (Radical Firearms part no. FP10.5-5.56M4-10RPR) is a 5.56 NATO AR pistol built on a forged mil-spec upper receiver with an M4 feed ramp for reliable feeding. The 10.5-inch, 1:7-twist barrel is machined from 4150 chromoly vanadium steel and finished in black nitride for corrosion resistance and long service life. A forged lower receiver pairs with a pistol buffer assembly wrapped in a foam sleeve, and the 10-inch forward guard shield with a top Picatinny rail gives you a full-length accessory mounting surface. Ambidextrous controls make the RF-15 fast and intuitive to run from either shoulder. Finished in black by Radical Firearms, this pistol delivers mil-spec compatibility at an approachable price point.

Key Specifications

• Chambered in 5.56 NATO/.223 Remington, one of the most versatile centerfire rifle cartridges available.
• Runs a 10.5-inch 4150 chromoly vanadium steel barrel finished in black nitride for corrosion resistance.
• Uses a 1:7 twist rate to stabilize a wide range of 5.56 bullet weights.
• Holds 30 rounds per magazine for a deep reserve of ready ammunition.
• Built on a forged mil-spec upper receiver with an M4 feed ramp for reliable feeding.
• Wears a 10-inch forward guard shield with a top Picatinny rail for a full-length accessory mounting surface.
• Includes a pistol buffer assembly with a foam sleeve for a compact, cushioned rear end.
• Equipped with an ambidextrous safety for fast manipulation from either side.
• Ships optics-ready with no fixed sights, leaving the top rail open for a red dot.
• Finished in black for a tough, low-maintenance exterior.

Frequently Asked Questions

What is the barrel made from? 4150 chromoly vanadium steel finished in black nitride for corrosion resistance and long service life.

What handguard does it wear? A 10-inch forward guard shield with a top Picatinny rail for a full-length accessory mounting surface.

Is this pistol optics-ready? Yes, it ships with no fixed sights so you can mount a red dot directly to the top rail.

Buy the Radical Firearms RF-15 Pistol, 5.56 NATO, 10.5-Inch, Black

Radical Firearms built this pistol to deliver genuine mil-spec construction and durable barrel materials without the premium price tag of a boutique build. Order it from our AR pistols lineup at our Lubbock, Texas gun shop for fast, insured shipping to your FFL.