The Radical Firearms AR-15 is a direct-impingement semi-automatic rifle in 5.56mm with a 16-inch barrel. It runs a mid-length gas system with a .750 low-profile gas block, which generally cycles more smoothly and with less felt recoil than a carbine-length setup on a 16-inch barrel. 
 

Key Specifications 

• Barrel Length: 16 inches 
• Caliber: 5.56mm 
• Capacity: 30 rounds 
• Condition: New in Box 
• Finish: Black 
• Manufacturer: Radical Firearms 
• Manufacturer Part Number: FR16-5.56SOC-15SHR 
• Model: AR-15 
• Type: Modern Sporting Rifle 
   

Features 

The 16-inch barrel is 4140 Chrome Moly Vanadium with a Melonite finish for corrosion and wear resistance. The M-Lok hybrid handguard is free-floated, so it doesn't contact the barrel — that keeps barrel harmonics consistent and leaves rail space for lights, grips, or other accessories. The B5 BRAVO stock adjusts to six length-of-pull positions. Grip is a B5 Type 23 pistol grip. Iron sights are not included — this ships optic-ready.

The Radical Firearms AR-15 16" in 5.56 is squarely a budget-tier entry-level rifle, and owner feedback reflects that clearly.

The price is the main draw, and most buyers acknowledge that going in. For the cost, owners report generally reliable function with standard brass-cased ammunition. The M-Lok hybrid handguard gets positive comments for its light weight. AR-15 platform modularity is a separate point that comes up — Radical builds a standard-spec rifle, so any AR-compatible parts drop in.

The consistent criticism is quality control. A subset of owners run into fit-and-finish issues: misaligned parts, inconsistent finishing, or components that need attention out of the box. It's not universal, but it's frequent enough to be a pattern. Some owners feel the base configuration is bare — no sights included, and ergonomics are nothing special compared to higher-priced alternatives. Customer service experiences vary; some report straightforward warranty handling, others describe slow or frustrating interactions.

Bottom line: it works for most buyers as an entry-level 5.56 AR at a budget price. Those who have quality control issues find the experience more frustrating than it would be with a more established brand.