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Anderson 5.56 16 inch M4 Barrel, Assembled Front Sight – Carbine Length

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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.

An Excellent Pick for your Next Build – Affordable and Highly Recommended

The perfect choice for your next AR build! Made from 4150 CMV Steel with a parkerized finish which features a carbine length gas system and a .750″ gas port with a 1:8 twist. Includes an A2 Front Sight Base With Sling Swivel, A2 M4 Notched Hand Guard Cap, & A2 Barrel Nut. Made in USA and backed by a limited lifetime warranty.


  • A perfectly balanced barrel for better accuracy. Works just as well as other expensive brands.


  • 4150 CMV steel makes barrel last long in action.

High Value

  • Superior quality at an unbeatable price.
  • TWIST RATE: 1:8
  • MATERIAL: 4150 Chrome Moly Vanadium
  • FINISH: Parkerized
  • GAS SYSTEM: Carbine
  • GAS BLOCK: .750?
  • MUZZLE THREAD: 1/2-28
  • INCLUDES: A2 Front Sight Base with Sling Swivel, A2 M4 Notched Hand Guard Cap & A2 Barrel Nut
  • ADDITIONAL SPECS/NOTES: Barrel is compatible with .223 Ammunition.

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Customer Reviews

Based on 5 reviews
Nice Barrel

I was surprised to see the quality of the barrel with such a great price with the A2 sight gas block being put together for you at AT3s shop . and I do have to say the install of the barrel was pretty easy even if your a beginner in the AR world . once I had it all done I went to the range and to be honest the barrel is dead on

Thank You AT3 for your service and quality products .

Thanks for sharing your feedback, Mark. We're glad you're satisfied with your purchase. Cheers!
Crooked front sight post

After finishing the build with this upper it has become apparent that the front A2 sight post is crooked. It’s clearly cocked off to the left. I have yet to zero it on paper, but the rear sight is significantly off center just from bore sighting it.

Thanks for sharing your feedback, James. We're glad you're satisfied with your purchase. Cheers!
Better than offered

Despairing of finding a 20 inch phosphate barrel with an A2 FSB, I saw a 16 inch 5.56 phosphate barrel offered by AT3 for a great price and ordered it. The photo showed a standard looking barrel with nut and FSB, but when I received it, it was a fantastic 223 Wilde barrel, with a really fine finish and barrel extension. Moreover, due to a one day delay in shipping, because my billing and shipping addresses were different, they threw in an A2 flash hider, crush washer and gas tube. The shipment arrived in fine order a few days later. The barrel has been mounted, headspaced, and sighted. My old eyesight took it out to 200 yards at the ranch with no trouble. Great product and fantastic customer service. Nough said.

Thanks for sharing your feedback, Peter. We're glad you're satisfied with your purchase. Cheers!
Excellent service

Fast shipping great product very happy ,would highly recommend shopping here.

Thanks for putting in a nice word for us, Mike! -- LM

no good

Please let us know if you encountered any issues, Kenneth. We'll be glad to assist. - AB