The Spike's Tactical Spider ST-15 complete AR-15 lower receiver is CNC-machined from 7075 T6 forged material and finished with MIL-A-8625F Type III Class 2 hardcoat anodizing for durability. It uses AR-15 pattern controls and accepts .154 diameter trigger and hammer pins, while the ST Spider logo is featured prominently on the left side of the magwell. Designed as the standard lower for ST-15 LE rifles, it includes the semi-auto lower parts kit, a 6-position mil-spec receiver extension, and an ST-T2 tungsten heavy buffer system.

Key features

• CNC-machined 7075 T6 forged lower with MIL-A-8625F Type III Class 2 hardcoat anodized finish
• ST Spider logo prominently on the left side of the magwell with bullet pictogram selector markings
• Semi-auto lower parts kit with rounded hammer and jeweled/polished trigger and hammer engagement surfaces
• AR-15 pin compatibility with .154 diameter trigger and hammer pins
• Includes 6-position mil-spec receiver extension, ST-T2 tungsten heavy buffer, and mil-spec 17-7 buffer spring
• Manual safety selector included; standard AR-15 pattern fire control operation

Build your ST-15 style AR-15 with a properly finished, mil-spec patterned Spider lower receiver engineered for dependable semi-automatic rifle operation.