Machined from billet 7075-T6 aluminum the A-DAC 15 is a fully ambidextrous lower receiver for AR15-style firearms. In addition to the Talon Ambidextrous Safety Selector left-side magazine release and right-side bolt release the A-DAC 15 features the patented A-DAC (Ambidextrous Dual Action Catch) which allows right-handed shooters to easily lock the bolt to the rear without taking their hand off fire control. To hold the bolt back using the A-DAC simply pull the charging handle to the rear depress the right-side magazine release button then release the charging handle. Other features and specifications include: Billet machined 7075-T6 aluminum construction w/ integral trigger guard and flared magazine well. SART (Self-Adjusting Receiver Tensioner) spring-loaded plunger to reduce upper/lower wobble. Radian Talon 45/90 Ambidextrous Safety Selectors (long/short). Enhanced Takedown Pin Set. All proprietary hardware included (extended bolt catch left-side magazine release paddle right-side magazine release button right-side bolt release paddle hammer pin. NOTE: All proprietary hardware included (extended bolt catch left-side magazine release paddle right-side magazine release button right-side bolt release paddle hammer pin)