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Jacob Grey Firearms High Polished Nickel Boron 5.56 Bolt Carrier Group (BCG) has been discontinued by Jacob Grey Firearms and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Gun Parts, AR 15 Parts, Rifle Parts, AR15 Upper Parts, Bolt Carrier Groups yourself to try and find the perfect replacement for you!
This M16 Bolt Carrier Group BCG drops right into your M16, AR15 or M4 platform rifle. Or any of the Jacob Grey JG-15 upper receivers. We source our components from manufacturers that meet or exceed our high expectations. All parts are machined and properly heat treated to Mil-Spec followed by complete Nickel Boron coating, then polished to a high shine so less oils and lubricants are needed to have your BCG function as it needs to.![]()
Our Nickel Boron Bolt Carrier Group BCG is specifically coated to allow your rifle to operate smoothly, be easily maintained, and work longer without unnecessary cleanings and field strips. Jacob Grey warrants our products against defects or malfunction to such a degree that if your product is defective in any way we will gladly replace it. Every component, from the extractor to the firing pin, is made with exacting specifications to meet military standards and provide the best control possible. The Jacob Grey High Polished BCG is engineered to fit and work with the AR15, M4, and as a M16 BCG.



