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11.5 Inch Faxon Gunner Barrel

Faxon Firearms 11.5 inch Gunner Barrel – 5.56 NATO – Mid-Length – 4150 QPQ

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90 Day No-Hassle Returns We Pay Return Shipping

We have a 90-day no-hassle return policy. We pay return shipping.

If you need to request a return, contact us at support@at3tactical.com and we will send you a return label

After 90 days, defective items will still be covered under the manufacturer’s warranty, where applicable.

Please refer to the product listing for warranty details. If you have specific warranty questions, contact us at support@at3tactical.com. We may direct you to pursue your warranty claim directly with the manufacturer.

Your satisfaction is our #1 priority

If you’re dissatisfied with your purchase, in any way, please contact us at support@at3tactical.com – we will do our best to make it right.

Fast & Free Shipping On orders over $50

You will receive fast, free shipping for all orders over $50

Shipping cost is $7.99 for orders under $50. We ship with UPS or USPS, depending on the item.

Most orders received by 1pm CST ship the same day

You will receive an email with tracking information at the time of shipment. To expedite shipping, we may ship your order from multiple warehouses. Orders placed on weekends, holidays, or after 1pm will ship the following business day.

Introducing the BIG GUNNER – Perfect for Suppressed Shooters

Ideal for suppressed shooters, the BIG GUNNER is designed for those looking to save weight while still allowing for the use of a suppressor long term – all for just a single pound! Built from 4150 GBQ Steel, this barrel goes through rigorous testing to ensure durability and optimum accuracy.

Faxon Firearms barrels offers superior quality without breaking the bank.


  • Experience top notch performance all for just a single pound! The advantage of using the suppressor long term while saving weight.


  • Fully stress relieved, air-gauge tested and 11 degree target crowned to ensure exceptional accuracy.

Tough Finish

  • Made from 4150 GBQ Steel with a QPQ nitride finish, this barrel went though rigorous testing to ensure reliability and durability.


Material: 4150 GBQ Steel
Type: Button Rifled
Caliber: 5.56 NATO*
Twist: 1:8
Length: 11.5″
Profile: BIG Gunner Hybrid
Gas System: Mid*
Inside Finish: QPQ Nitride
Outside Finish: QPQ Nitride
Muzzle Thread: 1/2-28 TPI (Threads Per Inch)
Gas Block Diameter: .625″
Barrel Extension: M4
Weight: 1.14 lbs
Magnetic Particle Inspected!
11-degree Target Crown

Important Notes

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Customer Reviews

Based on 1 review
11.5in Faxon build

I had been contemplating what barrel to go with for my new competition/plinking rig and took a chance on this barrel. the short dwell time had me worried but I'm now 1500rounds in and not a hiccup. Been 800 rounds since a cleaning and even with the carbon dirt and grime it still runs perfect. also I'm using a facon non adjustable gas block and H2 buffer rounds eject about 2-2:30 so its slightly over gassed but not too bad.

Also shout out to At3. had my barrel 3 days 4 if you include the day I orderd so bravo with the fast shipping!

Looking good! Thanks for sharing your experience, Keith. We work hard to meet expectations like yours, we're glad we hit the mark for you. Cheers! - AB