The Spike's Tactical ST-15 Enhanced 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 16" with 1:7 Twist cold hammer forged Mil-spec Barrel, ST Optimum Profile, Mid Length Gas System, ST Micro Gas Block, .750" Diameter Gas Seat, Spike's Tactical Mil-Spec M16 Bolt Carrier Group, ST BAR2 12" Rail, and A2 flash hider.
| Model | Complete Upper |
| Caliber | 5.56x45mm NATO |
| Barrel Length Range | 16" to 16.99" |
| Firearm Fit | AR-15 |
| Gun Platform | AR-Style |
| Sights | Optic Ready |
| Barrel Finish | Black Phosphate |
| Muzzle | A2 Flash Hider |
| Twist | 1:7" |
| Type | Complete |
| Handguards | 12" SAR3 Free-Floating |
| Receiver Material | 7075-T6 Aluminum |
| Thread Pattern | 1 / 2"-28 |
| Barrel Description | Mid-Length Steel |
| Barrel Length | 16" |
| Receiver Finish | Black |
| Weight | 4 lbs |
| Handguard Finish | Black |
