What's in the Box Smith & Wesson M&P 15 5.56mm AR Pistol (1) 30 Round Magazine Owner's Manual The M&P15 Pistol features a Hodge rail free-float handguard with M-LOK slots, four interchangeable palmswell grip inserts, flat face trigger, and a full length Picatinny-style rail, and a threaded barrel with a blast diverter. Firearm Features 7.75" M&P free-float handguard with M-LOK slots Full-length Picatinny-style rail Flat face trigger M&P grip with (4) Interchangeable palmswell grip inserts Chromed firing pin Forged, integral trigger guard Forward assist button Dust cover Threaded barrel with blast diverter 30 round PMAG Firearm Specifications Manufacturer: Smith & Wesson Model: M&P 15 Pistol Caliber: 5.56mm NATO Barrel Length: 7.5" Twist Rate: 1:7" Overall Length: 24.9" Finish: Black Grips: M&P Grip with interchangeable palmswell inserts Sights: None; Picatinny Rail Magazine Capacity: 30+1