The Spike’s Tactical ST-15 is a forged AR-15 lower receiver. It is machined from 7075-T6 aluminum billet and finished with MIL-A-8625 Type III hardcoat anodizing. The Punisher skull logo is laser engraved on the magwell.
Tolerances meet mil-spec dimensions for fitment with standard AR-15 upper receivers. The fire control pocket is machined to accept aftermarket triggers. The lower is marked multi-caliber for builds in 5.56/.223 or other compatible cartridges.
This stripped lower requires a standard AR-15 lower parts kit and buffer assembly to complete. It will pair with any mil-spec upper receiver. The threaded takedown pin holes are cut to standard depth for proper alignment.
This is a serialized firearm component. All purchases require shipment to your local FFL holder for transfer. No exceptions.
Jake Morrison’s shop notes
Spike's ST-15 lower has consistent trigger pin holes at 0.154" diameter, but the rear takedown pin detent channel is cut slightly shallow – had to relieve spring tension on two builds to prevent premature wear. Anodizing held up fine under vice block torque, but the Punisher engraving collects carbon more aggressively than flat surfaces during firing. Mated without issue to Aero Precision uppers, minor overhang at rear lug.
Tested: 2221 rounds bench-cycled. Pocket tolerance measured: within 0.001″ on this batch. Weight (actual): 22.2 oz on shop scale. Units shipped from Phoenix in May 2026: 67.
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