The Fail Zero lightweight bolt carrier group is a fully assembled 5.56mm AR-15 BCG that drops into most mil-spec upper receivers (Fail Zero part no. FZLWBCG01NH). Its lower mass cuts felt recoil, and it weighs 21 percent less than a mil-spec M16 carrier at 9.2 ounces total. All critical parts wear EXO Nickel Boron, a coating with permanent dry lubricity, extreme durability and resistance to wear and corrosion. It is a good fit for a lightweight carbine build that runs clean.

Key Specifications

• The design is a lightweight, lower mass carrier that reduces felt recoil.
• Total weight is 9.2 ounces, which is 21 percent lighter than a mil-spec M16 carrier.
• The coating is EXO Nickel Boron for permanent dry lubricity and corrosion resistance.
• The group is fully assembled and ready to drop in.
• It is built for mil-spec AR-15 upper receivers.
• The listing is for a 5.56mm AR-15 bolt carrier group.

Frequently Asked Questions

Is the bolt carrier group assembled? Yes. It comes fully assembled and ready to drop into most mil-spec AR-15 uppers.

How much lighter is it? Fail Zero rates it 21 percent lighter than a mil-spec M16 carrier, at 9.2 ounces total.

What is the coating? EXO Nickel Boron, which provides permanent dry lubricity, extreme durability and wear and corrosion resistance.

Buy the Fail Zero Lightweight Bolt Carrier Group, 5.56mm AR-15, Nickel Boron

Less reciprocating mass means a softer-feeling action, and the nickel boron coating keeps it running and easy to clean. Order it from our Lubbock, Texas gun shop for fast, direct shipping. See more from Fail Zero and browse our AR bolt carrier groups.