The Radical Firearms RF-15 RPR AR pistol in .300 AAC Blackout (brand part no. FP10.5-300HBAR-10RPR) uses the same mil-spec upper and lower receiver architecture as Radical’s 5.56 lineup, built around a 10.5-inch heavy-barrel profile matched to the Blackout cartridge’s shorter case. Radical Firearms threads the black barrel for muzzle devices or a suppressor and wraps it in a 10-inch RPR free-float handguard with M-LOK slots for lights and grips. The black anodized aluminum receiver carries a full-length Picatinny rail on top for optics, and the pistol ships with a bare receiver extension in place of a stock. Among AR pistols built for close-range performance, this RF-15 configuration favors shooters who want .300 Blackout’s terminal effect in a compact, maneuverable package.

Key Specifications

• Chambered in .300 AAC Blackout, this pistol runs a 30-round capacity magazine.
• The barrel measures 10.5 inches, machined to a heavy-barrel (HBAR) profile.
• The barrel is black finished and threaded for a muzzle device or suppressor.
• The 10-inch RPR free-float handguard carries M-LOK slots for lights and grips.
• The receiver is black anodized aluminum, built to mil-spec dimensions.
• A full-length Picatinny rail runs across the top of the receiver for optics.
• Both receivers are forged, mil-spec upper and lower for a duty-grade fit.
• No shoulder stock ships with the pistol; a bare receiver extension takes its place.
• The upper is optic-ready, with no fixed sights installed.

Frequently Asked Questions

Is the barrel threaded? Yes, the barrel is threaded for a muzzle device or a suppressor.

What handguard does this pistol use? A 10-inch Radical Firearms RPR free-float handguard with M-LOK slots.

Does it include a shoulder stock? No, it ships with a bare receiver extension in place of a stock.

Buy the Radical Firearms RF-15 RPR AR Pistol, .300 Blackout

A threaded 10.5-inch heavy barrel and .300 Blackout’s short-range punch make this RF-15 a natural fit for suppressed or subsonic use. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.