FailZero M16/M4 AR-15 BCG No Hammer Nickel Boron Coated
FailZero
$150.69
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FailZero
FailZero M16/M4 AR-15 BCG No Hammer Nickel Boron Coated
The FailZero M16/M4 AR-15 Bolt Carrier Group (No Hammer) delivers mil-spec reliability with next-generation EXO Nickel Boron coating technology, giving you a drop-in BCG engineered for smoother cycling, easier cleaning, and long-term durability.
- EXO Nickel Boron coating provides permanent dry lubricity without added oil
- Mil-spec M16/M4 profile fits most standard AR-15 upper receivers
- Extreme wear resistance extends the service life of critical internal components
- Superior corrosion resistance protects against moisture, sweat, and harsh environments
- Fully assembled and ready to install — no gunsmithing required
- Matte finish reduces light signature and maintains a tactical, low-profile appearance
Who This Is For
This BCG is ideal for AR-15 builders, competitive shooters, and serious enthusiasts who want a high-performance bolt carrier group that runs cleaner and longer between maintenance sessions. Whether you're assembling a new rifle or upgrading an existing build, the FailZero No Hammer BCG is a smart choice for anyone who demands reliability under pressure — from the range to the field.
Specifications
| Brand | FailZero |
|---|---|
| Model | M16/M4 BCG – No Hammer |
| Coating | EXO Nickel Boron (NiB) |
| Finish | Matte |
| Profile | M16/M4 Mil-Spec |
| Compatibility | AR-15 / M4 / M16 Upper Receivers |
| Assembly | Fully Assembled (No Hammer Included) |
| Lubrication | Dry Lubricity – Runs Without Oil |
| Corrosion Resistance | Yes |
| Country of Origin | USA |
Frequently Asked Questions
Does this BCG include a hammer, and what else might I need to complete my build?
No — as indicated by "No Hammer" in the product name, this bolt carrier group ships without a hammer. You will need to source a hammer separately as part of your lower parts kit. The BCG itself is fully assembled and includes the bolt, extractor, ejector, cam pin, firing pin, and firing pin retaining pin, making it ready to drop into your upper receiver right out of the box.
Does the Nickel Boron coating really allow the BCG to run without lubrication?
FailZero's proprietary EXO Nickel Boron coating is engineered to provide permanent dry lubricity, meaning the BCG can cycle reliably with minimal or no added lubricant. This makes it especially valuable in dusty, sandy, or cold environments where traditional oils can attract debris or thicken. While running completely dry is possible, many shooters still apply a light coat of oil for added peace of mind during extended range sessions.
Is this BCG compatible with .223 Remington, 5.56 NATO, and other AR-15 calibers?
This FailZero BCG is designed for standard mil-spec AR-15 platforms chambered in .223 Remington and 5.56 NATO. It is not intended for use with AR-10 or large-frame platforms, or pistol-caliber conversions that require a dedicated BCG. If you are building in an alternative caliber such as .300 Blackout, the BCG will still function correctly since those rounds headspace off the same bolt face as 5.56 NATO.
