Sons of Liberty Gun Works AR-15 Lower Receivers are premium spare or upgrade parts for any AR-15 standard build. They are available as multi-caliber receivers in the complete or stripped configuration or as a stripped receiver set, incorporating a stripped lower paired with a stripped upper. SOLGW AR-15 Lowers are designed to Mil-spec standards to bring the best performance and satisfy the needs of the most demanding users in the AR-15 field. Sons of Liberty's complete AR-15 receivers achieve a professional-level recoil reduction through their top-tier B5 Systems furniture and buffer system convenient for all shooting scenarios, from target practice to home defense to tactical applications. Their stripped receivers provide the most solid and reliable foundation to build the rest of your AR-15 kit. Resistant to temperature extremes, corrosion, and wear, SOLWG stripped lowers are precisely machined to Mil-spec tolerances to incorporate internals and uppers with minimal need for highly specialized tools.