FAXON SUPERFINISHED 5.56 GUNNER LIGHTWEIGHT BOLT CARRIER GROUP - NITRIDE

Built Past Mil-Spec Where It Counts

A bolt carrier group lives a hard life: every shot slams the bolt into battery, unlocks it under pressure, and drags the extractor across the case rim. Faxon starts with the mil-spec baseline and upgrades the parts that wear or break first.

Made in the USA to Faxon designs and specifications. Faxon checks bolt headspace, laser-engraves each carrier with the Faxon Shield and a lot number, and gives every carrier group a final inspection in Fairfield, Ohio before it ships.

FRT, Super Safety & Full-Auto Compatibility

An M16-pattern carrier keeps the full-length bottom and the auto sear trip surface that a semi-auto cut removes. That extra mass and full-length rear is what full-auto fire control groups need, and it's what most forced reset triggers and super safeties are designed around. It also gives every Faxon carrier the same mass and timing whether you run it semi-auto or with an enhanced trigger.

With any enhanced trigger, tune the gas. A lightweight carrier runs on less gas than a full-mass M16 carrier, and an adjustable gas block lets you set it for your ammunition, buffer, suppressor and trigger.

Gunner Lightweight vs. Full-Mass M16

What Reviewers and Owners Say

Independent testers keep putting the Gunner Lightweight near the top of their lightweight-BCG lists, and owners rate it a perfect 5 stars.

Average ratings: 5.0 out of 5 stars at FaxonFirearms.com; 4.5 out of 5 stars at OpticsPlanet.

FAQs

Is this BCG compatible with forced reset triggers (FRT)?

Yes. Every Faxon AR-15 bolt carrier group uses a full-auto rated M16-pattern carrier, and it works with forced reset triggers (FRTs) and super safeties as long as the trigger or safety you choose does not require physically modifying the carrier. Function depends on the whole system, so follow your trigger maker's buffer, spring and gas recommendations.

Will it work with a super safety?

Yes, on the same terms as FRTs: if the super safety does not call for cutting or otherwise modifying the carrier, a Faxon M16-pattern BCG drops in. The full-auto rated carrier profile is what most super safety and FRT makers ask for.

Is it full-auto rated?

Yes. It's an M16-pattern carrier with the full-length bottom and auto sear trip surface, rated for full-auto fire control groups where they're legally owned.

Is the Gunner Lightweight BCG good for 300 Blackout?

Yes, especially for subsonic and suppressed 300 BLK. Light carriers pair well with low-pressure loads, and an adjustable gas block lets you tune for both subs and supers. See the Faxon guide to 300 Blackout BCGs.

Do I need an adjustable gas block with a lightweight BCG?

Faxon recommends one. A lightweight carrier needs less gas to cycle, and most barrels are gassed for a full-mass carrier with no suppressor. An adjustable gas block lets you meter gas for your ammunition, buffer and suppressor, which keeps recoil soft and protects the carrier, extension and receiver from overgassing.

What do HPT and MPI mean?

HPT (high-pressure testing) proof-loads the bolt with a high-pressure round to confirm it holds up beyond normal service pressure. MPI (magnetic particle inspection) then checks the steel for cracks and flaws you can't see. Every Faxon AR-15 BCG bolt gets both.

What is 9310 steel and why use it for the bolt?

9310 is a nickel-chrome-moly alloy steel known for toughness and fatigue resistance. Faxon uses it in place of standard Carpenter 158 so the bolt lugs hold up better under repeated high-pressure cycles. More on 9310 bolts.

What does Superfinished mean?

Superfinish is Faxon's refined surface on the carrier body. It reduces friction and carbon adhesion, so the carrier cycles smoothly and wipes clean faster.

Where is it made?

Made in the USA to Faxon designs and specifications, and headspace-checked, lot-engraved and inspected by Faxon Firearms in Fairfield, Ohio. Covered by the Faxon Lifetime Guarantee.

Can Faxon headspace this bolt to my barrel?

Faxon offers bolt-to-barrel headspace matching on FaxonFirearms.com orders that include a Faxon barrel. Read how the matching service works. If you are pairing the bolt with a barrel that was not headspaced by Faxon, check it with go/no-go gauges before firing.

Faxon Lifetime Guarantee. Covers manufacturing and material defects to the original purchaser. Excludes damage from misuse, neglect, improper installation, or modifications. Normal wear of springs, extractors, gas rings and finish is not a defect. Register your product at faxonfirearms.com/product-registration. Full terms: faxonfirearms.com/warranty-privacy-terms.

Always verify headspace with go/no-go gauges when pairing a bolt with a barrel that was not headspaced by Faxon. Full-auto, forced reset and other enhanced fire control groups are regulated differently by state and locality; know and follow the laws where you live. Third-party trigger and buffer makers set their own installation requirements; follow them.

For questions, contact customerservice@faxonfirearms.com.