The San Tan Tactical STT-15L (brand part no. STT15L-COMBO-ANO-OD) is a matched lower and upper receiver set finished in OD Green and built around San Tan Tactical’s Pillar ambidextrous design, machined to tight tolerances for a true left- and right-hand-friendly AR-15 platform. The full suite of ambidextrous controls comes standard on every Pillar receiver set, so both the lower and upper ship ready for a true ambi build without aftermarket parts swaps. Because the set includes both receivers, builders get a matched pair machined to the same tolerances rather than fitting a lower to a separately sourced upper. It’s a strong option for left-handed shooters or anyone who wants full ambidextrous control from the ground up.

Key Specifications

• Includes a matched lower and upper receiver in a single set.
• Built on the Pillar ambidextrous design with full ambi controls standard.
• Supports true right- and left-handed manual of arms from the same receiver set.
• Machined to tight tolerances for consistent fit and function.
• Rated multi-caliber, compatible with common AR-15 chamberings.
• Runs a semi-automatic action, standard for AR-15-pattern builds.
• Finished in OD Green for a distinct look apart from standard black.
• Machined from 7075-T651 aerospace-grade aluminum with Type III hard-coat anodizing.
• Accepts standard mil-spec AR-15/M16 upper and lower parts kits.

Frequently Asked Questions

Does this include both a lower and upper receiver? Yes, it’s a matched lower/upper receiver set.

Does it include ambidextrous controls? Yes, the full suite of ambidextrous controls is standard on the Pillar design.

Buy the San Tan Tactical STT-15L Receiver Set

Build a true ambidextrous rifle from a matched receiver set, part of our AR15 lowers selection. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.