Model: M&P15 OPTICS READY - Series Name: Volunteer XV - Caliber: 5.56mm NATO/223 REM - Action: Gas Operated Semi Auto - Capacity: 30+1 Rounds - Barrel Length: 16.0 (40.6 cm) - Rifling: 1:8 Twist 5R Rifling - Stock: B5 Systems Bravo Stock - Grip: B5 Systems P-Grip 23 Pistol Grip - Length of Pull: 11.0-14.25 (27.9-39.2 cm) - Width: 2.5 (6.4 cm) - Overall Height: 9.0 (22.9 cm) - Overall Length: 33.0 (83.8 cm) Collapsed 36.25 (92.1 cm) Extended - Weight: 8.8 lbs. (3991.7 g) - Barrel Material: 4140 CMV Steel - Barrel Finish: Armornite - Receiver Material: 7075 Aluminum - Receiver Finish: Matte Black - OTHER FEATURES - BCMGunfighter forend with M-LOK - Flat-faced trigger. - Gas block with integral picatinny-style rail. - QD sling swivel attachment point (Bottom of gas block). - B5 Systems Bravo Stock. - B5 Systems P-Grip 23 pistol grip. - Chromed firing pin. - Forward assist. - Dust cover. - A2 flash suppressor. - Forged integral trigger guard. - Armornite finish on barrel (internal and external)