7.75" M&P free-float handguard with M-LOK slots. Fixed arm brace with closure strap. Full length Picatinny-style rail. One-point QD sling swivel attachment point in arm brace. Flat face trigger. M&P grip with (4) Interchangeable palmswell grip inserts. Chromed firing pin. Forged, integral trigger guard. Forward assist button. Threaded barrel with blast diverter.