First Look: ADM 13.9 Enhanced Mod 1 Carbine

A full-featured carbine with a shorter barrel length.

posted on August 8, 2023
ADM enhanced M4

American Defense Manufacturing (ADM) has just unveiled the new AR-15 pattern ADM4 5.56 NATO carbine, feature rich but budget friendly version of the other rifles from ADM. These carbines are built around a fully ambidextrous lower and upper billet receiver along with a 13.9-inch 5.56mm barrel that has been pinned and welded with a muzzle device that is not compatible with a suppressor. These types of carbines with shorter barrel lengths have become increasingly popular on modern builds as they rely on lengthier muzzle devices that are pinned and welded in place to make them compliant with federal regulations. The Surefire Eliminator 3P flash hider on the ADM4 an overall length of 16 inches, making it compliant with current firearms legislation.

American Defense Manufacturing outfits the ADM4 Enhanced carbine with furniture from Magpul Industries, ALG ACT triggers along with parts designed in-house by ADM. The billet machined upper and lower receiver set is also equipped with a tensioning screw that reduces the play between upper and lower receiver sets.

American Defense Manufacturing ADM4 Enhanced Mod 1 Specifications:

  • Caliber: 5.56 NATO
  • Action: Semi-automatic direct gas impingement
  • Trigger: Single stage, ALG ACT
  • Receiver Set: Billet upper and lower receivers
  • Bolt Carrier Group: Premium QPQ nitride finish
  • Barrel Length: 13.9 inches
  • Barrel Twist: 1:7-inch
  • Muzzle Device: Surefire Eliminator 3P, pinned and welded (non suppressor)
  • Handguard: M-Lok
  • Weight: 6 pounds, 5 ounces
  • Furniture: Magpul MOE/SL stock set

The retail price for the American Defense Manufacturing ADM4 Enhanced Mod 1 carbine starts at $1,840. ADM builds all of its firearms to order and will not start building any rifle until they have received the customer’s FFL information. As a result, the company’s lead times for new firearms are generally 6-8 weeks. To learn more about this carbine or other firearms and products from American Defense Manufacturing, please visit the company's website at


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