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Q built this bolt carrier group because they couldn't find one clean enough for their own rifles, so they went and made their own. The result is a two-piece design that breaks the carrier into a front end and a rear end, which lets each section use the material that suits it best. It's a genuinely different take on a part that most companies have been copying the same way since the 1960s.
The front end is machined from maraging stainless steel and dressed in a black nitride coating, which cuts down on friction and shrugs off wear and corrosion. That front section also gets a SCAR-cut to help tame bolt bounce, so cycling stays smoother when the rifle is running fast. The rear end is bare heat-treated stainless steel and holds the standard mil-spec overall length, so it drops right into any standard AR-15 upper.
The clever bit is how the rear end retains the firing pin. Instead of the little cotter-style retaining pin that AR owners have been fighting and losing for decades, the design holds the firing pin captive without one. The whole carrier is held together with a single pin, which makes field stripping quick and keeps small parts from wandering off on the bench.
This is a complete group ready to run. It ships with a mil-spec gas key that comes properly staked, along with a mil-spec bolt, cam pin, and firing pin. Q states the whole assembly meets and exceeds mil-spec standards, and the larger front-end design gives them tighter control over the critical machining that makes or breaks a carrier.
Made in Dover, New Hampshire, this BCG is a strong pick if you're building a fresh 5.56 upper or upgrading a carrier that's seen better days. It also works with .223 Remington and 300 Blackout on the AR-15 platform.
Instead of a single-piece carrier, Q splits the assembly into a front end and a rear end so each section uses the ideal material. The front is maraging stainless with a black nitride coating and a SCAR-cut to reduce bolt bounce, while the rear is heat-treated stainless. It's a modern reworking of a design that has largely stayed the same for decades.
No, and that's one of the standout features. The rear end holds the firing pin captive on its own, so you skip the tiny cotter-style retaining pin that AR owners are famous for bending or losing. The whole carrier is held together with a single pin, which keeps field stripping simple.
Yes. The overall length is mil-spec, so it drops into any standard AR-15 or M4-pattern upper receiver. It's built around 5.56x45mm and also runs .223 Remington and 300 Blackout.
It ships complete and ready to install. You get the front and rear sections plus a mil-spec gas key that comes properly staked, along with a mil-spec bolt, cam pin, and firing pin. Just clean off the packing lube, add your preferred lubricant, and go.
| UPC | 850035705841 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | ACC-AR-BCG-2PC |
| Color | Black |
| Model | |
| Product Type | Bolt Carrier Group |
| Shipping Weight | 0.75 |
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