FailZero M16 Full Auto Bolt Carrier Group (BCG) Black has a black topcoat on top of FailZero's EXO Nickel Boron coating. The wear areas including ramps, rails, and other contact points such as carrier ends will wear and expose the Nickel Boron coating beneath. The non-wear areas which are exposed during operation such as the area exposed by the dust cover will remain black. The bolt carrier group comes fully assembled and ready to drop into any mil spec M16, M4 or AR15 upper receiver. All of the critical parts are coated with FailZero's EXO Nickel Boron which provides permanent dry lubricity, extreme durability, corrosion resistance and will reduce friction and improve the overall performance of your AR-15 based rifle.
Wet lubrication is never needed. The EXO Technology dissipates heat so efficiently that the rifle will run cooler and cleaner since wet lubrication isn't needed.
All FailZero parts are mil-spec quality.
Nickel Boron treated parts include:
- Bolt & Extractor (5.56/.223 compatible)
- Bolt Carrier
- Cam Pin
- Carrier Key
- Firing Pin