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, f-marked a2 front sight base,.750" diameter gas seat, spike's tactical mil-spec m16 bolt carrier group, mid length handguards, and a2 flash hider.

Receiver Finish: Black
Type: Complete Gas Impingement
Caliber: 223 Rem
Sights: A2 Front
Barrel Length: 16"
Twist: 1:7"
Barrel Description: Cold Hammer Forged
Barrel Finish: Black
Handguards: Mid Length
Handguard Finish: Black
Barrel Length Range: 16" to 16.99"