Lantac M-SPEC Lower Parts Kit AR-15 with Ambidextrous Safety Selector

Complete M-SPEC Lower Parts Kit (LPK) for AR-15 style rifles manufactured to military specifications with correct materials, heat treatments, and finishes. Kit includes takedown pin, pivot pin, pin detents and springs, ambidextrous safety selector with detent and spring, buffer retainer and spring, bolt catch assembly with plunger spring and roll pin, and bolt catch set screw compatible with Lantac, Aero, and other lowers. Features high-quality components designed for reliable performance and proper fit.