KAK Industry 16 Inch OE-SPEC Rifle Length 5.56 NATO AR-15 Barrel

SKU: 121-0103-020

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Unwavering Reliability with KAK’s Mil-Spec 16″ 5.56 Barrel

This 16-inch 5.56 NATO barrel brings proven military-grade performance to your AR-15 platform. Constructed in-house from certified 41V50 chrome moly steel, the bore is precision-honed and air-gauged to ensure tight tolerances.

A rugged nitride finish provides extreme corrosion and wear resistance, even during heavy use. The medium government profile maintains quick maneuverability while the rifle-length gas system enables smooth, consistent cycling.

Expect match-grade accuracy thanks to the fast 1:7 twist rate, optimized to stabilize both 55-grain and heavier 5.56 projectiles. Weighing under 30 ounces, this barrel combines rock-solid durability with light, balanced handling characteristics.

For next-level reliability and accuracy, equip your AR with this Mil-Spec 5.56 barrel proudly manufactured in the USA. Experience KAK Industry’s unwavering quality and precision first-hand.


  • Brand: KAK Industry
  • Model: 16 Inch OE-SPEC 5.56 NATO AR-15 Barrel
  • MPN: 121-0103-020
  • Caliber: 5.56 NATO
  • Length: 16 inches
  • Gas System: Rifle-length
  • Gas Block Journal: 0.750″ dimpled
  • Threads: 1/2-28
  • Finish: Nitride
  • Twist Rate: 1:7
  • Material: 41V50 Chrome Moly Vanadium
  • Extension: M4 Feed Ramps
  • Weight: 29.97 ounces
  • Made in USA


Caliber5.56 NATO/.223 Remington
Barrel Length16 inches
Barrel Twist Rate1:7 inches
Barrel Material4150 CMV
Muzzle Threads1/2/2028
Barrel FinishBlack Nitride
Gas Block Size.750″ Gas Block
Barrel Gas SystemRifle
Gas Block Journal Length1.9 inches
Barrel ExtensionM4
Weight9.97 ounces

Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

KAK Industry Warranty Information

Our #1 priority is your 100% satisfaction. If any product you purchase from us ever fails to 100% meet or exceed your expectation, please contact us via telephone or EMAIL and we will attempt to resolve the situation to your satisfaction. If you need to return an item, returns are accepted subject to the following guidelines:

No Returns or Refunds are allowed after 30 days from Invoice Date.

  • Shipping costs both ways are non-refundable. Orders that were shipped to you at no charge with a “Free Shipping” offer will have the cost of the original shipping deducted from the refund amount.
  • New items that have been used may not be returned unless defective.
  • Returns must include all accessories as shipped. Refunds will be adjusted for returns missing accessories, factory boxes, etc. or may be returned to the customer at the customer’s expense, at our option. If you are keeping or have lost some of the pieces, please don’t return the item.
  • Items marked Closeout or Blem, as well as Special Orders may not be returned and their sale is final.
  • Items that are Custom contract manufactured may not be returned and their sale is final unless defective
  • Returned items may be subject to a restocking fee.
  • Any damaged shipments must be reported to the carrier immediately for proper claim handling.
  • All returns must be prepaid. Insurance on returns is at your option and at your expense and risk. COD returns will NOT be accepted and the package will be returned to you.

Contact Details

Address: 2241 Celsius Ave, Unit C, Oxnard, CA 93030
Telephone: 805-981-4734
Email: sales@kakindustry.com

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.