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The FailZero FZ M16/M4 BCG is one of the smoothest-running upgrades you can drop into an AR-15 build, and the matte version keeps that famous slickness with a lower-shine look. It arrives fully assembled and ready to slide into most mil-spec M16, M4, and AR-15 upper receivers chambered in 5.56 NATO, .223 Rem, or 300 Blackout. FailZero has been the name in Nickel Boron since 2009, and their parent company UCT Coatings applies the same patented EXO finish found on things like Army mortar tubes and Blackhawk helicopter hoists, so you know the coating has been tested well beyond the range.
Every critical part on this carrier group gets the EXO treatment, including the bolt, extractor, cam pin, carrier key, and firing pin. The coating gives the whole assembly a permanent dry lubricity with an ultra-low coefficient of friction, which means the bolt glides inside the upper and cycles noticeably smoother than a standard phosphate BCG. That same slick surface makes cleanup a breeze since carbon tends to wipe right off instead of caking on, and the finish adds real corrosion and wear resistance for the long haul.
The "no hammer" part is simple. Some FailZero kits include a Nickel Boron coated hammer for the trigger group, and this one leaves it out. That's the right call if you already have a trigger you like or you're running a drop-in trigger unit, so you're not paying for a part you'll just set aside.
This is a full-auto profile M16-cut carrier, which adds a little mass at the rear for reliable cycling across a range of loads and gas systems. It's a great match for a range gun, a competition setup, or any build where you want dependable function with minimal fuss. Like any BCG, it still likes a bit of lube to run its best, but the Nickel Boron finish keeps things running clean between wipe-downs. FailZero also backs these carriers with a limited lifetime warranty.
This model is configured without the trigger-group hammer that some FailZero kits include. It's designed for builders who already have a trigger installed or plan to use a separate drop-in trigger. You get the complete carrier group with the bolt and internals coated, just no hammer in the box.
It's built for standard AR-15 platform rounds, so it handles 5.56 NATO, .223 Remington, and 300 Blackout since they all share the same bolt face. It is not compatible with larger cases like 6.5 Grendel, 6.8 SPC, or .308. If your build uses a standard 5.56/.223 bolt, this carrier group is a direct fit.
Yes, that's one of the biggest draws of this coating. The Nickel Boron surface is very slick, so carbon tends to wipe off instead of building up like it does on phosphate carriers. You'll still want to run some lube on it, but general upkeep is quicker and less messy.
It is an M16-cut, full-auto profile carrier. That extra material at the rear adds a bit of mass, which many builders prefer for reliable cycling across different loads and gas systems. It drops straight into most mil-spec M16, M4, and AR-15 upper receivers.
| UPC | 094922034977 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | FZ-M164-01-NH-MATTE |
| Model | |
| Product Type | Bolt Carrier Group |
| Color | Black |
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