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This FailZero Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec M16, M4 or AR15 upper receivers.
All critical parts are coated with EXO Nickel Boron technology that provides permanent dry lubricity, extreme durability, increase wear and corrosion resistance. FailZero's patented Nickel Boron coating will reduce friction and improve the overall performance of your rifle.
- M16/Auto carrier is machined from 8620 steel
- Carrier is laser etched with the FailZero logo
- Bolt is Carpenter 158 steel
- Bolt is HPT/MPI and shot peened
- Bolt is Marked "M" and laser etched with the FailZero logo
- Gas key is attached with Grade 8 hardware and torqued to spec
- Gas Key is staked to spec
- All critical parts are coated with EXO nickel boron technology
- Made in USA.
* Depending on product batch, these may come packaged in bulk or in clamshell packaging (depends on how FailZero sends them to us). They are the same exact brand new part, regardless of packaging style. The FailZero BCG's tend to be grey/silver in color and are not shiny/polished.