The Radical Firearms RPR in 5.56x45mm NATO (MPN FR16-5.56SOC-15RPR) is an AR-15 pattern rifle built on mil-spec upper and lower receivers, pairing a 16-inch barrel finished in black Melonite with a 1:7-inch twist and a 1/2×28 threaded muzzle. Radical Firearms fits this rifle with a 15-inch RPR free-float M-LOK rail, a B5 Systems Type 23 pistol grip, and a B5 Bravo 6-position stock. The rifle feeds from a 30-round magazine and includes a manual safety with no sights installed, leaving the top rail open for an optic. Among AR-platform rifles in the AR rifles category, the RPR favors shooters who want a well-equipped, optic-ready 5.56 AR-15.

Key Specifications

• Chambered in 5.56x45mm NATO/.223 Remington.
• Rifled at a 1:7-inch rate of twist.
• Features a 16-inch barrel finished in black Melonite.
• Muzzle is threaded 1/2×28.
• Includes a 15-inch RPR free-float M-LOK rail.
• Fitted with a B5 Bravo 6-position stock and Type 23 pistol grip.
• Feeds from a 30-round magazine.
• Includes a manual safety.
• Ships with no sights installed, ready for an optic.
• Overall length is approximately 34.75 inches.

Frequently Asked Questions

Does this rifle come with sights? No, it ships without sights, ready for an optic to be mounted on the top rail.

What handguard does this rifle use? A 15-inch RPR free-float M-LOK rail.

Is the muzzle threaded? Yes, at 1/2×28.

Buy the Radical Firearms RPR 5.56mm NATO

A well-equipped, optic-ready 5.56 AR-15 is exactly what the RPR delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.