Spikes Tactical STLS033 Stripped Lower — Multi-Caliber, 7075-T6

The Spikes Tactical STLS033 Water Boarding Instructor is a stripped lower receiver designed for the AR-15 platform. Forged from 7075 T6 aluminum and finished in a black hardcoat anodize, it is intended to support multi-caliber configurations and RDIAS-equipped builds. This receiver ships stripped and requires a lower parts kit, buffer assembly and stock to complete a functioning firearm.

Key Specifications

• The receiver is constructed from 7075 T6 aluminum.
• Finished in Black Hardcoat Anodized for durable corrosion resistance.
• Designed to fit the AR-15 platform.
• Supports Multi-Caliber configurations as specified by the manufacturer.
• Identified as model STLS033.
• This item is sold as a Stripped lower receiver and does not include internal parts.
• Specified action compatibility: Semi-Auto.
• Weighs approximately 8.60 oz.
• Compatible with RDIAS systems per the product description.
• Packaged with 1 unit per box.

As a purpose-built stripped lower, the STLS033 gives builders a durable, serviceable foundation for custom AR-15 builds and repairs. Its forged 7075-T6 construction and hardcoat finish deliver a balance of strength and corrosion resistance for range, training, and competition applications. Specified for multi-caliber use and RDIAS compatibility, this lower is suited to experienced builders who will complete the receiver with the appropriate parts and assemblies.