Spike's Tactical creates quality parts, uppers, and complete rifles. Each component is manufactured to Mil-spec standards and are backed by the Spikes Tactical lifetime warranty. This particular upper receiver features a 16" cold hammer forged chrome-moly vanadium mil-spec barrel with a 1:7" twist rate. It also features a mid-length gas system with a low-profile gas block, Spike's Bar2 12" length free float handguard, and the Spike's mil-spec M16 bolt carrier group.

Specifications and Features:
Spikes Tactical Upper Receiver STU5435-R2S
5.56mm NATO (accepts .223 Remington)
16" barrel
Cold hammer forged, Chrome-moly vanadium mil-spec barrel
1:7" Twist
Mid-length gas system
Low-profile gas block
Spikes Tactical mil-spec M16 bolt carrier group
12" BAR 2 free float rail system
A2 Flash hider
Upper receiver is 7075-T6 forged flattop

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