Spikes Tactical Complete Phosphate M-16 BCG features phosphate coating inside and out (bolt, carrier and gas key), laser engraved with ST spider logo, mil spec carrier and full auto M-16. Includes Mil-Spec Extractor, Mil-Spec Gas Key, Firing Pin, Cam Pin and Retaining Pin.
Specifications:

Type	Bolt Carrier Group
Model	M16/AR15
Dimensions
Size	223 Remington/5.56 NATO
Material	Steel
Action
Trigger
Safety
Thread Pattern
Finish	Nickel Boron
Bolt Type
Hand
Hammer Type
Max Capacity