The Radical Firearms RF-15 5.56 NATO pistol is the shortest of Radical’s RPR pistols, with a 7.5-inch M4 profile barrel (brand part no. RF01861). Radical Firearms builds it on forged 7075-T6 receivers and adds a 7-inch RPR free-float rail with M-LOK slots and an A2 flash hider. The BTR brace takes the place of a shoulder stock and keeps the pistol steady at close range. It is a good fit for a tight, maneuverable 5.56 pistol that still handles accessories well.

Key Specifications

• The chambering is 5.56 NATO, the standard AR-15 cartridge with plenty of ammunition choices.
• The barrel is 7.5 inches in an M4 profile, a compact length for tight spaces.
• The barrel steel is 4140 chrome moly vanadium, durable enough for sustained use.
• The barrel finish is Melanite, a hardened treatment that resists corrosion and wear.
• The twist rate is 1:7, which stabilizes a wide range of modern 5.56 bullet weights.
• The handguard is a 7-inch RPR free-float rail, which keeps pressure off the barrel and gives M-LOK mounting space.
• The gas block is a low-profile .750 design that fits beneath the free-float handguard.
• The receivers are forged 7075-T6 aluminum, MIL-STD upper and lower, for durability and parts compatibility.
• The muzzle device is an A2 flash hider, which reduces visible flash.
• The rear support is a BTR brace, fitted in place of a shoulder stock.

Frequently Asked Questions

How long is the barrel? This RF-15 has a 7.5-inch M4 profile barrel with a 1:7 twist.

Does it use a brace or a stock? It uses a BTR brace in place of a shoulder stock.

What handguard does it have? Radical fits a 7-inch RPR free-float rail with a slim M-LOK interface.

Buy the Radical Firearms RF-15 Pistol, 5.56 NATO, 7.5-Inch, 7-Inch RPR, BTR Brace

Seven and a half inches is about as short as a 5.56 AR pistol gets, and the free-float rail keeps it useful rather than just small. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and browse more AR pistols while you are here.