FailZero AR-15 BCG 5.56 No Hammer, Black EXO Nickel Boron

Description

FailZero made its name on Nickel Boron, and this AR-15 bolt carrier group is a great example of why folks keep coming back. It shows up fully assembled and drops right into most mil-spec AR-15 uppers chambered in 5.56 NATO or .223 Remington, so you can pull your old carrier and have this one running in a few minutes. The carrier is machined from 8620 steel with a staked gas key, and the critical parts carry FailZero's EXO Nickel Boron treatment underneath a black exterior topcoat that keeps things non-reflective.

What the EXO Coating Does for This FailZero BCG

The big draw here is the coating. EXO Nickel Boron gives you permanent dry lubricity, which means the carrier group runs slick even when you're light on oil, and it holds up against wear and corrosion better than a standard phosphate finish. The other bonus you'll notice at the cleaning bench is how easily carbon wipes off the slick surface. Fewer patches, less scrubbing, more time actually shooting. FailZero has been doing this coating longer than most, and the reputation is well earned.

The No Hammer Setup Explained

The "No Hammer" part just tells you what's in the box. This is a complete bolt carrier group with the bolt, extractor, cam pin, firing pin, and carrier key, but no fire control parts. That's exactly what you want if you're replacing a worn carrier or finishing out a fresh upper, since you already have a trigger group in your lower.

Living With the Black Topcoat

One thing worth knowing so there are no surprises: the black topcoat sits over the nickel boron, and high-contact areas like the rails, ramps, and carrier ends will eventually wear through to the silvery nickel boron beneath. That's normal and it doesn't hurt function one bit. Non-wear spots, like the area you see through the dust cover, tend to keep their black finish. Builders who have run these hard report smooth, reliable cycling over thousands of rounds with the coating staying put.