This Nickel Boron bolt carrier is an eye catching addition to your AR build. It features Mil-spec dimensions and coating, is made of steel, with a shrouded firing pin, Mil-Spec extractor spring, black extractor insert, Viton O-ring and a tool steel extractor.
Specifications:

Type	Bolt Carrier Group
Model	AR-15
Dimensions
Size	223 Remington/5.56 NATO
Material	Steel
Action
Trigger
Safety
Thread Pattern
Finish	Nickel Boron
Bolt Type
Hand
Hammer Type
Max Capacity