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A bolt carrier group is the beating heart of any AR-15, and this one from Fail Zero is built to keep things running smooth for the long haul. It arrives completely assembled with the bolt, extractor, cam pin, carrier key, and firing pin all in place, so you can pull it out of the package and drop it right into most mil-spec upper receivers. The bolt face handles 5.56 NATO, .223 Remington, and 300 Blackout, which makes it a flexible pick whether you're finishing a fresh build or swapping out a tired carrier.
The real story here is the EXO Nickel Boron treatment on all the critical parts. Fail Zero is the company that helped pioneer this coating, and it shows in the way the group performs. The finish creates permanent dry lubricity, meaning the metal itself is slick and you don't have to drown it in oil to keep it cycling. That slick surface also fights off carbon buildup and corrosion, so wipe-downs after a range day take a rag and a couple q-tips instead of a soaking and a scrub session.
This is a standard-weight semi-auto BCG machined from proven steel, with an 8620 tool steel carrier and a hardened steel bolt underneath that nickel boron finish. Fail Zero magnetic particle inspects and test fires their carrier groups, which is the kind of quality control you want in the part that does the most work in your rifle. Folks who run these regularly tend to report thousands of rounds with smooth cycling and easy maintenance the whole way through.
This is the no-hammer AR-15 configuration, so it's aimed at semi-auto rifle builds using standard charging handles and mil-spec uppers. If reliability and painless cleanup are what you're after, this is a straightforward upgrade that earns its keep every time you head to the range.
Yes, the bolt face on this Fail Zero group is rated for 5.56 NATO, .223 Remington, and 300 Blackout since those cartridges share the same bolt head dimensions. As with any 300 Blackout build, it's smart to confirm fitment against your specific barrel and upper before assembling. That one carrier covers all three chamberings, which is handy if you swap uppers.
The EXO Nickel Boron finish gives the metal permanent dry lubricity, so it runs slick without needing to be drenched in lube. A lot of folks run these with just a light film of oil, and the coating helps keep carbon from sticking. Cleanup is one of the biggest reasons people reach for this BCG in the first place.
It ships fully assembled with the bolt, extractor, cam pin, carrier key, and firing pin installed, and it's built to drop into most mil-spec AR-15 upper receivers. There's no tuning or extra fitting needed for standard builds. Just slide it in with your charging handle and you're ready to run.
This is the semi-auto profile carrier and it's the no-hammer configuration, so a hammer is not included. It's meant for standard semi-automatic AR-15 rifle builds. If your build already has a working fire control group, this drops right in as your carrier.
| UPC | 881314861835 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 009-FZAR15-01-NH |
| Color | AR15 COMPLETE BOLT CARRIER |
| Length | 10.3000 |
| Model | |
| Product Type | Bolt Carrier Group |
| Shipping Weight | 0.0 |
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