Spikes STU5025M4S Complete Upper 5.56x45mm NATO 16″ Black Phosphate Barrel,

The Spike’s Tactical ST-15 LE upper line-up is designed as a fully Mil-spec compliant upper series for law enforcement. This same level of quality and performance is now available to everyone, all at a price range that is affordable to shooters of any budget. Each component is manufactured to Mil-spec standards. This model features Spike’s Tactical 16″ with 1:7 Twist Mil-spec Barrel, M4 Barrel Profile, Carbine Length Gas System, F-marked A2 Front Sight Base, .750″ Diameter Gas Seat, Spike’s Tactical Mil-Spec M16 Bolt Carrier Group, M4 Double Heat Shield Handguards, and A2 Flash Hider.