Polymer80

This lower parts kit includes a trigger, disconnector, hammer, trigger spring, hammer spring, trigger pin, hammer pin, (2) take down detents, (2) take down springs, front take down pin, rear take down pin, bolt catch, bolt catch spring, bolt catch detent, bolt catch roll pin, trigger guard roll pin, trigger guard, buffer detent, buffer detent spring, safety selector, safety selector detent, safety selector detent spring, pistol grip, magazine release, magazine catch, and a magazine catch spring.