Radical Firearms FP 10.5 HBAR 7.62×39 10.5in 10rd

The Radical Firearms FP 10.5 HBAR 7.62×39 10.5in 10rd is a compact AR-style pistol built for shooters who want reliable performance from a hard-hitting intermediate cartridge. Chambered in 7.62x39mm, this pistol uses a 10.5-inch HBAR-contour barrel with a pistol-length gas system to keep the platform short and maneuverable while still delivering the energy of the AK round. It ships with a 10-round magazine and combines forged 7075 T6 upper and lower receivers with a 10-inch free-float M-LOK handguard for accessory mounting. According to Radical Firearms specs, this model is designed for durability and corrosion resistance, making it a solid choice for range use or compact-platform applications.

Key Features

• HBAR-Contour Barrel (10.5 inches) — This heavier profile barrel resists heat buildup during rapid fire, helping you stay on target longer without accuracy loss. It matters because it gives you consistent shot placement even when shooting multiple rounds in quick succession.
• Free-Float M-LOK Handguard (10 inches) — The handguard attaches directly to the barrel nut without touching the barrel, so adding a light, grip, or bipod won’t shift your point of impact. It matters because you can customize the setup without worrying about accuracy changes.
• Forged 7075 T6 Receivers — Both upper and lower are forged from aircraft-grade aluminum, then hardcoat anodized for scratch and corrosion resistance. It matters because the pistol stays reliable and looks good even after years of use.
• Pistol-Length Gas System — The shorter gas system cycles the action reliably with the 7.62x39mm cartridge’s pressure curve, even when using a compact 10.5-inch barrel. It matters because you get consistent ejection and feeding from the first round to the last.

Who It’s For

This pistol is for shooters who want a compact AR platform that packs more punch than 5.56mm. It’s ideal for range plinking, truck or backpack carry, or as a training tool for someone stepping up from 9mm to a rifle cartridge. The 10.5-inch barrel keeps overall length short, so it works well for smaller-framed shooters or anyone who needs a handy, lightweight firearm. Beginners will appreciate the familiar AR controls, while experienced shooters will like the ability to mount lights and optics without worrying about barrel interference.

Pros and Cons

• Pro: Compact overall length — easy to maneuver in tight spaces or store in a range bag.
• Pro: Uses affordable and widely available 7.62x39mm ammunition.
• Pro: M-LOK handguard lets you attach accessories without removing the barrel.
• Con: Limited magazine compatibility — standard AR-15 .223/5.56 magazines won’t work; you’ll need dedicated 7.62x39mm AR mags. Also, some users report that the pistol-length gas system can be slightly over-gassed with certain loads, so you may need to tune the buffer weight for perfect reliability.

Comparison with Similar Pistols

The Radical Firearms FP 10.5 offers a more affordable entry to a compact AR pistol with a hard-hitting cartridge, while the Zev OZ9 is a 9mm handgun and the Agency Arms pistol is a 5.56mm platform at a much higher price point.

FAQ

✔️ Nationwide delivery (all 50 states) — we ship to your FFL dealer
✔️ Ships 1-2 business days from order placement
✔️ 30-day returns — if it’s not right, send it back
✔️ Secure checkout — your payment info is always protected

Browse more AR Pistols or check out our Lower Parts and Upper Assemblies.

Last updated: April 2026