Radical Firearms FP85300HBAR7RPRBTR BTR 300 Blackout AR Pistol
The Radical Firearms FP85300HBAR7RPRBTR BTR is a purpose-built AR Pistol designed for operators demanding a compact, high-performance platform chambered in 300 Blackout. This system is optimized for versatility, delivering consistent performance with both supersonic and subsonic ammunition, particularly when integrated with a suppressor. Its robust construction and precise component selection ensure reliability in demanding operational environments.
Key Features
Barrel System
This AR Pistol features an 8.50-inch barrel with a heavy barrel (HBAR) profile. The HBAR contour enhances barrel rigidity, mitigating flex and optimizing harmonic consistency for improved accuracy potential. Chambered in 300 Blackout, this barrel length is specifically tuned to maximize the cartridge’s ballistic characteristics within a compact footprint. Barrels are typically constructed from 4140 chrome-moly steel and finished with a Melonite or Nitride treatment for superior corrosion resistance and wear durability, an industry standard for maximizing service life.
Handguard Integration
The system incorporates a Radical Firearms RPR (Radical Rail) free-float handguard. This design prevents contact with the barrel, preserving barrel harmonics and thus contributing to inherent accuracy. The M-LOK accessory interface allows for direct attachment of mission-essential equipment, facilitating a streamlined and customizable setup without unnecessary bulk.
Gas System Optimization
A carbine-length gas system is precisely tuned for this 8.50-inch 300 Blackout configuration. This configuration ensures reliable cycling across a broad spectrum of ammunition types, including varying projectile weights and pressures, and maintains consistent operational parameters when suppressed. The gas port size is calibrated to achieve a balanced cycling rate, contributing to system longevity and consistent ejection patterns.
Receiver Construction
The upper and lower receivers are precision-machined from forged 7075-T6 aluminum. This material choice provides an optimal balance of strength and weight, ensuring structural integrity under stress. The receivers are finished with a Type III hard coat anodizing, delivering a durable, non-reflective surface that resists abrasion and corrosion in the field.
Operational Utility
The compact form factor of this AR Pistol facilitates superior maneuverability in confined spaces, making it highly effective for vehicle operations, home defense, or as a readily transportable firearm. The reduced overall length contributes to ease of storage and deployment, without compromising ballistic effectiveness within its intended engagement envelope.
Technical Specifications
General
- Manufacturer: Radical Firearms
- Model: FP85300HBAR7RPRBTR BTR
- SKU: TSW|181921
- Category: AR Pistol
Firearm Details
- Caliber: 300 Blackout
- Barrel Length: 8.50 inches
- Barrel Profile: Heavy Barrel (HBAR)
- Gas System: Carbine Length
- Receiver Material: Forged 7075-T6 Aluminum
- Receiver Finish: Type III Hard Coat Anodized
- Handguard: Radical Firearms RPR Free-Float M-LOK









