All the parts you would reasonably need to keep your AR-15 running while dealing with zombies in the field. The same parts used by CMMG for all of their rifles and kits.  All CMMG products meet or exceed Mil-Spec standards.

Kit Includes:

• Firing pin

• Firing pin retaining pin

• Trigger and hammer pins

• Extractor spring

• Extractor pin

• Extractor spring assembly

• Extractor

• Disconnector

• Disconnector spring

• Ejector

• Ejector spring

• Cam pin

• Takedown pin

• Pivot pin

• Takedown and pivot pin detents

• Takedown and pivot pin detent springs

• Safety detent

• Bolt carrier key screws

• Hammer spring

• Trigger spring

• Bolt gas rings

• Bolt catch spring

• Bolt catch roll pin

And Of Course, Made In The United States of America