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FailZero built this one for folks who want their AR to cycle a little softer and shoot a little flatter without fussing over lube. It's a complete, fully assembled bolt carrier group that drops straight into most mil-spec AR-15, M16, and M4 uppers, and the whole thing tips the scale at just 9.2 oz. The carrier by itself comes in around 6.4 oz, which works out to roughly a 21% weight reduction over a standard mil-spec carrier. Less reciprocating mass means less movement inside the receiver, and that translates to a calmer recoil impulse and faster target reacquisition between rounds.
Every critical component on this FailZero BCG is treated with the company's patented EXO Nickel Boron. That coating gives you permanent dry lubricity, so the surfaces stay slick even when you're running dry, along with real wear and corrosion resistance. The nickel boron parts include the bolt and extractor, the carrier, cam pin, carrier key, and firing pin. The high-polish finish is more than just good looks too, since that slick surface cuts resistance and makes carbon wipe right off after a range session.
The low-mass design is a favorite with competition folks chasing tighter split times and hunters trying to trim ounces off a lightweight build. The bolt face handles 5.56 NATO, .223 Remington, and .300 AAC Blackout, so it's a flexible pick across common AR chamberings. Several shooters running suppressed .300 Blackout setups have noted this carrier helped smooth out cycling with subsonic loads. Keep in mind lightweight carriers pair best with a properly tuned gas system, so an adjustable gas block or the right buffer weight helps you dial everything in.
Backed by FailZero's lifetime guarantee, this is a straightforward upgrade for anyone who wants smoother running, easier cleaning, and a bit less felt recoil out of their rifle.
Yes, it comes fully assembled and drops right into most mil-spec AR-15, M16, and M4 upper receivers. If your upper is built to standard mil-spec dimensions, you're good to go. It's a no-fuss install with no fitting required.
The bolt face is compatible with 5.56 NATO, .223 Remington, and .300 AAC Blackout. That covers the most common AR chamberings, including .223 Wylde barrels. It's a flexible carrier group if you run more than one upper.
The EXO Nickel Boron treatment gives the carrier permanent dry lubricity, so it runs slick even when it's dry. A lot of folks still add a light coat of oil out of habit, which is fine, but the coating means you're not dependent on heavy lube to keep things moving. Cleanup is also quicker since carbon tends to wipe right off the polished surface.
Reliability comes down to your gas system being tuned for the lower reciprocating mass. Many shooters pair this carrier with an adjustable gas block or an adjusted buffer weight to dial in cycling, especially on suppressed or .300 Blackout setups. Once it's tuned right, the reduced mass gives you smoother running and softer felt recoil.
| UPC | 881314861897 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | FZ-LW-BCG-01-NH |
| Color | AR15 COMPLETE BOLT CARRIER |
| Length | 10.6500 |
| Model | |
| Product Type | Bolt Carrier Group |
| Shipping Weight | 0.665 |
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