Spikes Tactical “Water Boarding Instructor” Stripped Lower Receiver — Multi-Caliber | 7075-T6 Aluminum | Black Anodized | AR-15 | Model STLS033 | UPC: 815648028343

Elevate your AR-15 build with the Spikes Tactical Water Boarding Instructor Stripped Lower Receiver (Model STLS033) — a premium, multi-caliber compatible lower crafted from aircraft-grade 7075-T6 aluminum and finished with a durable black hard-anodized coating. Built for builders who demand precision, durability, and clean MIL-SPEC fitment, this stripped lower is the rock-solid foundation for a custom rifle that performs under stress and looks the part.

Precision Materials & Finish

• 7075-T6 Aircraft-Grade Aluminum: High strength-to-weight alloy used in aerospace and precision firearms components for superior rigidity and long service life.

• Black Hard Anodized Finish: Corrosion-resistant, wear-resistant coating that preserves aesthetics and helps protect the receiver in harsh environments.

• CNC Machined to Tight Tolerances: Accurate dimensional control for consistent, repeatable fit with MIL-SPEC parts and matched Spikes uppers.

Clean, Thoughtful Design for Custom Builds

• Stripped Lower Configuration: Arrives as a bare lower receiver — receiver only, no fire control group, buttstock, buffer assembly, pistol grip, or magazine included. Ideal for builders who wish to choose each component to suit their needs.

• Multi-Caliber Compatibility: Designed to work with commonly available AR-15 bolt/carrier groups and barrels to support a range of calibers when paired with the correct upper and bolt. (Always confirm compatibility between your chosen upper assembly, bolt, and barrel.)

• MIL-SPEC Fire Control Pocket & Pin Alignment: Accepts standard mil-spec hammers, triggers, and selector assemblies for straightforward part selection and interchangeability.

• Standard Magazine Well: Works with standard AR-15 magazine catch/release components and common STANAG-style magazines.

Performance Advantages

• Durability: 7075-T6 and hard anodizing combine to resist deformation and surface wear under heavy use.

• Consistent Fitment: Tight machining tolerances reduce slop between upper and lower — improving build feel and potential repeatable accuracy via stable action alignment.

• Lightweight Strength: Offers the robustness required for repeated field use without unnecessary weight.

Ideal For

• Custom builders seeking a reliable, high-quality lower as the foundation of a precision or duty-grade AR-15 platform.

• Gunsmiths and hobbyists who want a stripped receiver to match with upgraded furniture, triggers, and barrels for a tailored shooting experience.

• Anyone putting together a multi-caliber rifle (with appropriate uppers/bolts) who values MIL-SPEC compatibility and premium materials.

Important Notes & Legal Compliance

• Stripped Receiver — Firearm Status: This item is sold as a stripped lower receiver and is subject to all applicable federal, state, and local laws. In many jurisdictions a stripped lower is considered a firearm and may require transfer through a licensed dealer and background check. Verify and comply with your local regulations prior to purchase.

• No Parts Included: Does not include trigger group, safety selector, buffer tube assembly, pistol grip, stock, magazine, or upper receiver components. These items must be purchased separately and installed according to manufacturer recommendations or by a qualified gunsmith.

• Compatibility Reminder: Though designed for broad AR-15 compatibility, confirm that your chosen upper, barrel, and bolt carrier group are correctly matched for the caliber you intend to use.

Key Specifications (At-A-Glance)

• Model: STLS033

• UPC: 815648028343

• Type: Stripped Lower Receiver (AR-15 platform)

• Material: 7075-T6 Aluminum

• Finish: Black Hard Anodized

• Configuration: Multi-caliber compatible when paired with appropriate upper/bolt/barrel assemblies

• Compatibility: Accepts standard MIL-SPEC fire control components and STANAG-style magazines

Why Choose the Spikes Tactical Water Boarding Instructor Lower?

Spikes Tactical has built a reputation among builders for rugged reliability and practical designs that work in real-world conditions. The Water Boarding Instructor stripped lower combines aerospace-grade materials, exacting machining, and a protective finish — giving you a premium base to build a dependable, long-lasting AR-15 tailored to your requirements.

Whether you’re assembling a precision hunting rig, a lightweight duty rifle, or a competition build, this lower provides the high-quality foundation your parts deserve.

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