- Spike’s Tactical 16″, 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
- A2 Flash Hider
The SPIKES TACTICAL 5.56/.223 Rem Upper, 16in. Chrome Lined Barrel, 1:7 Twist, Flat Top (STU5025-M4S) is designed as a fully Mil-spec compliant upper series for law enforcement. It is ready to be mounted to any Mil-Spec AR-15 lower receiver!
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 and backed by the Spike’s Tactical Lifetime Warranty.









