The SOLGW M4 L9 Rollmark Lower Half w/Milspec Buffer System; No Stock M4LOWER-MS-NS-L9 is a high-quality lower receiver designed for AR-15 builds. Constructed from mil-spec 7075-T6 aluminum forgings, this lower features the distinctive Loyal 9 roll mark and is finished with a Type III hard coat anodized finish for durability and corrosion resistance. The mil-spec buffer system includes a 6-position receiver extension tube, an H buffer, and a Sprinco Blue spring, ensuring reliable performance and smooth operation. This lower is machined to tight tolerances for a precise fit and includes a low shelf for compatibility with various fire control groups. SOLGW M4 L9 Rollmark Lower Half w/Milspec Buffer System; No Stock M4LOWER-MS-NS-L9