CMMG Gun builders kit includes most of the necessary parts to build up your lower group except the commonly upgraded parts. Does not include Trigger Guard, Fire Control Group and pistol grip. All parts meet or exceed Mil-Spec.
Specifications:

Type	Lower Parts Kit
Model	AR Style
Dimensions	Standard
Size	AR-15
Material	Various
Action
Trigger
Safety
Thread Pattern
Finish	Black
Bolt Type
Hand
Hammer Type
Max Capacity