The FN SCAR 15P is a semi-automatic, piston-driven rifle-platform pistol chambered in 5.56 NATO with a 7.50-inch barrel. It ships with a 30-round magazine, a Picatinny rail, and an SB Tactical brace. The black finish runs across the receiver and furniture. 
 

Key Specifications 

• Brand: FN America 
• Model: SCAR 15P 
• Caliber: 5.56 NATO 
• Action: Semi Auto 
• Capacity: 30rd 
• Barrel Length: 7.5 in 
• Color/Finish: Black 
   

Detailed Features 

• 7.50-inch barrel in a pistol configuration with SB Tactical brace 
• Picatinny rail for optics and accessories 
• 30-round magazine included 
• 5.56 NATO chambering (accepts 5.56x45mm)

Owners of the SCAR 15P point to the piston-driven system as the main draw over a standard AR-pattern pistol, cooler and cleaner running, especially with the short 7.5-inch barrel where gas impingement designs can be harsh. The SB Tactical brace gets used extensively, though some owners note it is the first part they replace.

The 7.5-inch barrel makes the SCAR 15P very compact and relatively easy to maneuver in tight spaces. Muzzle blast and noise are significant at that barrel length, which makes hearing protection a firm requirement indoors. Most owners run a muzzle device immediately.

Price is the most common point of friction. The SCAR 15P costs considerably more than comparable AR pistols, and some owners feel the premium is hard to justify unless you specifically want the piston system and the FN platform. Those who are already in the SCAR ecosystem tend to view it differently.