Strike Industries Enhanced AR-15 Lower Parts Builders Kit

The Strike Industries Enhanced AR-15 Lower Parts Builders Kit is a convenient upgrade package, perfect for new builds, spare parts, or to update your favorite rifle. This kit includes all the essential parts you need to complete your build. This kit includes a bolt catch spring, buffer retainer spring, disconnector spring, hammer spring, magazine catch spring, pivot detent spring, selector spring, takedown detent spring, trigger spring, enhanced bolt catch, strike magazine catch, SI Extended Pivot / Takedown Pins, HEX selector switch 60/90deg 3-in-1, bolt catch plunger, bolt catch roll pin, hammer pin, pivot detent, selector detent, takedown detent, trigger pin, and buffer retainer. Does NOT include pistol grip or trigger parts. Compatible with Mil-Spec AR-15 and AR-9 lower receivers. The included bolt catch, bolt catch roll pin, pivot pin, and takedown pin are NOT compatible with AR-10 lower receivers.