Santan Stt-15 Pillar 9mm OD Green Rifle

The San Tan Tactical STT-15 Pillar 9mm OD Green Rifle lower receiver is purpose-built for shooters and gunsmiths demanding a precision foundation for modern sporting rifles and tactical platforms. This anodized lower serves as the regulated firearm component, engineered to withstand the demands of duty-grade applications, training cycles, and precision rifle builds. The olive drab finish bridges professional aesthetics with operational utility, making it equally at home on a duty rifle or a competition platform.

Machined from high-grade aluminum, the STT-15 lower features San Tan Tactical's proprietary pillar design—a structural enhancement that reinforces critical stress points where the upper receiver and buffer tube assembly interface. The anodized finish provides corrosion resistance and durability in harsh environments, while the tight tolerances ensure reliable function across thousands of round counts. Designed specifically for 9mm platform compatibility, this lower accommodates blowback or direct impingement upper configurations, giving builders flexibility in caliber selection and system architecture without requiring separate lower receivers.

Law enforcement armorers, military personnel, and serious civilian builders benefit from this lower's durability and precision fit. Installation requires proper headspace gauging, a fire control group rated for 9mm, and an appropriately configured upper receiver; this is not a plug-and-play component for novices. The 0.88 lb weight contributes minimal mass to the receiver group, preserving balance and handling characteristics critical in tactical carbine work. Compliance with all applicable federal regulations is the responsibility of the end user and FFL holder.