LBE Unlimited AR Essentials Kit - Includes Bolt catch plunger - Bolt catch spring - Bolt catch roll pin - Buffer retainer - Buffer retainer spring - Disconnector spring - Hammer spring - Trigger spring - Hammer pin - Trigger pin - Pivot pin detent - Pivot pin detent spring - - Takedown pin detent - Takedown pin detent spring - Selector detent - Selector detent spring - Trigger guard roll pin - Ma