Radical Firearms RPR .300 AAC Blackout 10.5″ HBAR Pistol

About this product

The Radical Firearms RPR is a compact AR-platform pistol chambered for .300 AAC Blackout, designed for close-quarters use, range work, and compact duty applications where an AR-style pistol is preferred. It pairs a 10.5″ HBAR-contour threaded barrel with a 10″ free-float M-LOK handguard to provide accessory mounting room while keeping overall length compact. Forged 7075 T6 upper and lower receivers with a top Picatinny rail deliver a familiar, durable interface for optics and controls. The pistol uses a pistol-length gas system and ships with an A2 flash hider and a pistol tube buffer assembly.

Key Specifications

• The caliber is .300 AAC Blackout.
• The barrel measures 10.5 inches.
• The twist rate is 1:8.
• The gas system is pistol-length.
• The handguard is a 10-inch free-float M-LOK design.
• The upper receiver is forged 7075 T6.
• The lower receiver is forged 7075 T6.
• The muzzle device is an A2 flash hider.
• The barrel thread pitch is 5/8×24.
• The pistol uses a pistol tube buffer/stock interface.

Purpose-built for shooters who want a compact AR-format pistol in .300 AAC Blackout, this Radical Firearms RPR balances short-barrel handling and accessory capacity without sacrificing standard AR ergonomics. Its forged receivers and free-float M-LOK rail provide a solid foundation for optics and practical additions, making it a versatile choice for range work, compact carry solutions where legal, and precision-oriented short-barrel builds.

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