The Fail Zero 6.8 SPC bolt carrier group comes fully assembled and ready to drop into most mil-spec upper receivers chambered in 6.8 SPC (Fail Zero part no. FZ68SPC01NH). All the critical parts carry Fail Zero’s EXO Nickel Boron coating, which provides permanent dry lubricity and resists wear and corrosion. The extractor hardware uses a heavy spring, a silicone insert and an o-ring for better extraction tension. Nickel Boron also makes cleanup easy.

Key Specifications

• The cartridge is 6.8 SPC, and the bolt assembly is also compatible with the 6.8 SPC II.
• The bolt carrier group is fully assembled and ready to install in most mil-spec uppers.
• The coating is EXO Nickel Boron for permanent dry lubricity and extreme durability.
• The nickel boron treatment covers the bolt and extractor, M16 cut carrier, cam pin, carrier key and firing pin.
• The extractor uses a heavy spring, silicone insert and o-ring for better extraction tension.
• It is also compatible with .224 Valkyrie.

Frequently Asked Questions

Is the bolt carrier group fully assembled? Yes. It comes completely assembled and ready to install.

What coating does it use? Every critical part is coated with EXO Nickel Boron, which gives permanent dry lubricity and increases wear and corrosion resistance.

Can I use it with the .224 Valkyrie? Fail Zero lists this bolt carrier group as .224 Valkyrie compatible.

Buy the Fail Zero 6.8 SPC Bolt Carrier Group, Nickel Boron

A nickel boron BCG runs clean and wipes down fast, and this one is set up for the 6.8 SPC. Order it from our Lubbock, Texas gun shop for fast, direct shipping. See more from Fail Zero and browse our AR bolt carrier groups.