Model: M&P15 PISTOL – Caliber: 5.56mm NATO/223 REM – Action: Gas Operated Semi Auto – Capacity: 30+1 Rounds – Barrel Length: 7.5 (19.05 cm) – Rifling: 1:7 Twist – Width: 2.0 (5.08 cm) – Overall Height: 7.0 (17.78 cm) – Overall Length: 24.9 (63.2 cm) – Weight: 5.75 lbs. (2608.2 g) – Barrel Material: 4140 Steel – Barrel Finish: Armornite Finish -Interior & Exterior – Receiver Material: 7075 Aluminum – Receiver Finish: Matte Black – OTHER FEATURES – 7.75 M&P free-float handguard with M-LOK slots. – Full length Picatinny-style rail. – Flat face trigger. – (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.