The Radical Firearms RPR is a 5.56x45mm NATO semi-automatic pistol with a 7.5-inch barrel and 30+1 round capacity. It weighs 4.8 lbs at 23.25 inches overall. 
 

Key Specifications 

• Brand: Radical Firearms 
• Model: RPR 5.56 NATO Pistol 
• Caliber: 5.56x45mm NATO 
• Action: Semi-Automatic 
• Capacity: 30+1 rounds 
• Barrel Length: 7.5 inches 
• Overall Length (OAL): 23.25 inches 
• Weight: 4.8 lbs 
• Finish: Black Hardcoat Anodized/Black Melonite 
• Sights: Optic Ready 
   

Detailed Features 

The barrel is 4140 Chrome Moly Vanadium steel with a Melonite finish for corrosion resistance. Twist rate is 1:7, which stabilizes heavier 5.56 projectiles. The A2 flash hider reduces visible muzzle flash in low-light conditions. A free-floating M-Lok handguard improves barrel cooling and accepts standard M-Lok accessories. The optics-ready upper has no fixed sights, designed around a mounted optic. 
 

Usage Scenarios 

• Home Defense: 30+1 capacity and AR-pistol size work well in confined spaces where a full-length rifle is harder to maneuver. 
• Range Use: The optics-ready rail makes zeroing a red dot or magnifier straightforward. 
• Competitive Shooting: 7.5-inch barrel and 4.8 lb weight suit close-range competition formats.

The RPR draws interest mainly because of its price relative to other AR-pistol platforms in 5.56. Buyers who prioritize cost find it a workable entry into the format, and the optics-ready upper gives meaningful setup flexibility.

Build quality is the most divided topic in owner feedback. Some users run it without issues through a variety of ammunition; others encounter fit-and-finish concerns or functional problems after heavier use. The short 7.5-inch barrel produces more muzzle rise and blast than longer configurations — most owners acknowledge this as inherent to the platform rather than a product defect, though it does affect rapid-fire control. At range distances beyond close quarters, the tradeoffs of a 7.5-inch barrel become more apparent. The consensus in most discussions is that the RPR is a reasonable range and recreational option at its price point, but buyers with serious tactical or competition demands typically opt for better-finished alternatives.

The all-metal construction gives this compact Radical a reassuringly substantial feel. It arrived as described and is ready for the optic of my choice, which keeps the basic setup simple while leaving that decision to me.