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

Faxon Firearms 16 inch Pencil 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.

Preferred by Major Brands – Lightweight and Extremely Accurate

Faxon Firearms Barrels are known for its superior quality and value. This 16″ Pencil Barrel is a favorite among major brands such as Robar, 2A Armament and others for their ideal balance of performance and weight. Manufactured 100% in house, 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: Pencil
  • Gas System: Mid
  • Inside Finish: QPQ Nitride
  • Outside Finish: QPQ Nitride
  • Muzzle Thread: 1/2-28 TPI (Threads Per Inch)
  • Gas Block Diameter: .625″
  • Gas Block Journal Length: 1.1″
  • Barrel Extension: M4
  • Weight: 1.20 lbs
  • Magnetic Particle Inspected!
  • 11-degree Target Crown

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Customer Reviews

Based on 1 review
Light Weight AR Build

Building a light AR and purchased this Faxon pencil mid length barrel. It was packaged well and appears to be a quality item. At just over a pound its going to help get my carbine in the 4.5 to 5.5 lb range. The 3 star rating is based on its overall appearance, price and the service provided by AT3. I will bump the rating up or down when I get to put rounds down range. Thanks AT3 for excellent products and service.

Thanks for your feedback, EH. We're glad you're satisfied with your purchase - AB