Fail Zero Nickel Boron BCG 556


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FailZero is the undisputed pioneer of Nickel Boron technology. When failure is not an option, you can depend on Fail Zero.

This Fail Zero BCG is fully assembled and drop-in ready for most Mil-Spec upper receivers. All critical parts are coated with EXO Nickel Boron technology providing permanent dry lubricity, extreme durability and increased wear and corrosion resistance. This patented Nickel Boron coating will reduce friction and improve the overall performance of your rifle.

Nickel Boron is an extremely durable finish with self-lubricating properties so your AR15 cycles smoother and requires less lubrication. Fail Zero BCGs are plated by UCT Coatings of Palm City FL, the same company that does it for Toolcraft.

Called EXO Technology, this is a patented process that applies a Nickel Boron finish so durable that it is specified on Army 81mm and 60mm mortar tubes, Blackhawk helicopter hoists, and for hard use applications on some Navy ships!  IMO, this may be the ultimate upgrade to the All-American AR-15. And it looks good too!

See our blog article Top 3 Reasons You Might Want a Nickel Boron BCG

This is a 223/5.56/300 Blackout bolt carrier group.

See our Fail Zero BCG Review

Also see our Toolcraft Nickel Boron BCG.

This AR BCG will not work with 6.5/6.8/308 etc.

Bolt Material Carpenter 158 Steel
Bolt Finish EXO Nickel Boron
Caliber 223/5.56/300 Blackout
Carrier Material 8620 Steel
Carrier Finish EXO Nickel Boron
Carrier Design Heavy Profile M16 Style
High Pressure Tested High Pressure Tested (HPT)
Mag Particle Inspected Mag Particle Inspected (MPI)


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