Push-button speed safety selector for AR-15 and AR-10 rifles. Replaces the standard lever selector with a single press-through button that takes the rifle from safe to fire in one motion - no 60deg or 90deg rotation, no thumb re-grip. Built for 3-gun stages, defensive drills, and range training where every tenth counts. Fit AR-15 lower receivers chambered in .223 / 5.56 AR-10 / LR-308 lower receivers chambered in .308 / 7.62 NATO Standard mil-spec safety detent pocket - drop-in replacement, no fitting Right-hand operator layout (push in from the left, exit on the right) Features One-motion push-through button, safe-to-fire in a single press Red indicator ring exposed when the rifle is hot for a quick visual safety check Steel body with matte black finish for corrosion resistance Ships with detent pin and spring for install Quieter reset than a lever throw - no distinct 60deg/90deg click Install notes Uses the factory safety detent and spring pocket in the lower. Remove the pistol grip, drop out the old selector, seat the push-button body from the left side, and reinstall the detent and spring. No fitting required for standard mil-spec lowers. Verify function on an empty rifle before live fire - the button should press through cleanly with the hammer cocked and stop cleanly at the safe position with the hammer forward. Not compatible with: ambidextrous safety lowers, billet lowers with a reversed detent bore, or drop-in trigger cassettes that block the standard detent pocket.