Faxon Firearms 5.56X45Mm Nato Lightweight Mil-Spec Bcg Nitride Tin Pvd

The Faxon Firearms 5.56 NATO Lightweight Mil-Spec BCG is built for shooters who refuse to settle—whether you're running a precision rifle at the range, a tactical setup for competition, or a dependable AR for hunting. This bolt carrier group brings genuine engineering improvements to a part that absolutely has to work. Faxon engineered it to be lighter than typical mil-spec groups without sacrificing strength or reliability, using stronger 9310 tool steel for the bolt and implementing QPQ salt bath nitriding across all components for superior corrosion resistance and wear life compared to standard chrome and phosphate finishes.

The real difference is in the details. Every bolt is fully MPI tested to catch material defects before they reach you. The bolt lugs are chamfered at 45 degrees to ensure reliable feeding even under high pressures and fast cycling. All components receive superfinishing to reduce friction and fouling, letting the BCG run smoother and require less gas to cycle. Grade 8 fasteners secure the gas key and are fully staked for permanent reliability. The extractor is cut from S7 tool steel, heat-treated and shot-peened to spec, then nitrided for longevity.

This BCG maintains full-auto trip sear compatibility and works with modern multi-stage trigger systems, so it'll function reliably whether your firearm is set up for semi or full-auto capability. The forward assist serrations are standard M16 profile. If you're building or upgrading an AR-15 and want a carrier group engineered for durability and smooth operation without unnecessary weight, Faxon's reputation for quality—backed by their laser-engraved inspection mark—speaks for itself.

Key Features

• Lightweight design (6.32 oz carrier and key) reduces reciprocating mass for faster cycling
• 9310 tool steel bolt—stronger than standard C158—for superior durability under high pressure
• QPQ salt bath nitriding on all components increases corrosion resistance and surface hardness
• Superfinished surfaces reduce friction, fouling, and gas requirement
• Fully MPI tested bolts ensure material integrity and eliminate defects
• Chamfered bolt lugs (45°) for reliable feeding at any pressure level
• Full-auto rated with trip sear maintained; compatible with multi-stage triggers
• Grade 8 fasteners, fully staked gas key for lifetime service
• S7 tool steel extractor, heat-treated and shot-peened per mil-spec
• Laser-engraved Faxon Shield mark after quality inspection

Specifications

Frequently Asked Questions

Will this BCG work with my AR-15 dust cover and charging handle?

Yes. The forward assist serrations are standard M16 profile, and the BCG is designed to work with typical AR-15 upper receivers and dust covers.

Is this bolt carrier group rated for full-auto fire?

Yes. This BCG is full-auto rated and maintains the trip sear for full-auto fire control groups. It's also compatible with new multi-stage trigger systems.

What's the weight advantage compared to standard mil-spec BCGs?

The carrier and key together weigh 6.32 ounces. This lightweight design reduces reciprocating mass, allowing faster cycling and requiring less gas pressure to operate.

How does the nitriding process protect this BCG?

Faxon uses QPQ salt bath nitriding on all components, which increases surface hardness, improves corrosion resistance, and enhances wear life compared to typical chrome and phosphate finishes. The process also increases the carrier's natural slickness, reducing friction and fouling.