DPMS LR308 lower receiver kit is made to the strict military specifications and includes everything to build a complete a lower receiver, less a stock assembly and stripped lower receiver. 
Includes: 
.308 Bolt Catch Screw, .308 Front Pivot Pin, .308 Take Down Pin, Bolt Catch, Bolt Catch Buffer, Bolt Catch, Spring, Buffer Retainer Pin, Buffer Retainer Spring, Detent Selector, Detent Spring, Disconnector, Disconnector Spring, Hammer, Hammer Pin, Hammer Spring, Magazine Catch, Magazine Catch Button, Magazine Catch Spring, Pistol Grip, Pistol Grip Lock Washer, Pistol Grip Screw, Selector, Selector Spring, Take Down Detent, Trigger, Trigger Pin, Trigger Spring.