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Faxon Firearms 16 inch Gunner Barrel - 5.56 NATO - Mid-Length - 4150 QPQ

Faxon Firearms 16 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.

Perfectly Balanced Weight and Performance – Get the Most Out of Your Barrel Today!

Faxon Firearms Barrels are known for its superior quality and value. This 16″ Gunner Barrel is a favorite among shooters and for first time builders. The perfect combination of weight and accuracy, you can never go wrong with this barrel. Manufactured 100% in house by Faxon, these barrels are fully individually tested to ensure reliability and durability.


  • For just over a pound, experience superior accuracy and top notch performance.


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

Tough Finish

  • Built from 4150 CMV Steel with QPQ Nitride Finish from the inside and out, this barrel is as strong and tough compared to other expensive brands.


  • Material: 4150 CMV Steel
  • Type: Button Rifled
  • Caliber: 5.56
  • Twist: 1:8
  • Length: 16”
  • Profile: GUNNER
  • Gas System: Mid
  • Finish: QPQ Nitride
  • Finish: QPQ Nitride
  • Thread: 1/2-28 TPI (Threads Per Inch)
  • Gas Block Diameter: .625″
  • Gas Block Journal Length: 1.9″
  • Barrel Extension: M4
  • Weight: 1.37 lbs
  • Magnetic Particle Inspected!
  • 11-degree Target Crown

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Customer Reviews

Based on 1 review
Faxon Gunner Barrel

I bought a econo model A/R with a 1.9 Wylde barrel and got decent groups with 55 gr. at 100 yards but want to shoot out to at least 500 yards. This Faxon gunner barrel gave me tighter groups at 100 yards and gave me an acceptable group at 500 yards. With a little more practice I am very confident I can obtain my goal. The barrel makes a huge difference.

Thanks for sharing your experience, Mark. We're glad you're satisfied with your purchase - AB