– FEATURES 4″ Blade M&P Knife w/ folding lock liner, belt cutter and glass breaker tip – FEATURES M&P Spec Series Challenge Coin UPC 022188890938 Action STRIKER Barrel Length 4.6 BARREL Caliber 9MM LUGER (9X19 PARA) Capacity 23 ROUNDS Finish GRAY CERAKOTE Weight 1.8 LBS.