The Smith & Wesson M&P15 FPC is a 9mm semi-automatic rifle built around a folding stock design. When folded it measures as short as 16.38 inches; extended, the adjustable stock brings it out to 30.38 inches. That range makes it genuinely compact to transport and store without sacrificing a full-length 16.25-inch barrel. 
 

Key Specifications 

• Manufacturer: Smith and Wesson 
• Model: M&P15 FPC 
• Type: Semi-Auto Rifle 
• Caliber: 9mm Luger 
• Barrel Length: 16.25 inches 
• Overall Length: 16.38 inches - 30.38 inches (folded to extended) 
• Weight: 5.78 lbs 
• Cartridge Capacity: Up to 23 rounds 
• Number of Magazines Included: 3 (1 x 17 round, 2 x 23 round) 
• Finish Type: Hard Coat Black Anodized 
• Stock Material: Polymer (Folding Stock) 
• Muzzle Type: Threaded 
• Mount Type: Picatinny Rail 
   
  The threaded muzzle accepts suppressors and standard muzzle devices. An M-Lok handguard keeps the rifle light while leaving room for accessories. It ships with a Crimson Trace red dot already mounted, so you're not paying extra for a separate optic.

The M&P15 FPC 9mm gets a lot of attention for the folding stock, and most owners report it does what it promises: the rifle stores and transports in a noticeably smaller footprint than a standard carbine. Using 9mm means shared ammunition with a handgun, and that practical point shows up in almost every positive discussion of the platform. Accuracy at typical carbine distances gets good marks, and the included Crimson Trace red dot is usually called out as a genuine value-add rather than a throwaway sight.

On the critical side, some users find it heavier than expected for a folding rifle. 5.78 lbs is light for a carbine but not light for something sold partly on portability. A few owners note that certain controls feel less natural than on a traditional AR layout. Price draws mixed reactions: owners who factor in the three magazines and the red dot tend to feel the value is there; buyers comparing it to stripped-down competitors see it differently. Aftermarket parts availability is limited compared to standard AR platforms, which comes up in discussions about long-term customization.