This ambidextrous safety selector fits standard AR-15 and DPMS-pattern AR-10. It replaces the standard safety and allows either hand to use the selector.
To install, remove the pistol grip, selector spring, selector detent and standard safety selector. Put the bigger piece of this ambi safety selector on the left side of the lower receive. Place the smaller piece of the safety into the groove of the bigger piece and secure with the screw. Replace the selector detent, selector spring and pistol grip.