5.56mm NATO BARREL, 16.0", THREADED, 1:7" TWIST

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Barrel Length:
16 in.

This YHM 16″ M4 5.56 NATO Mid-Length barrel was designed around the USASOC specs for an Improved Upper Receiver Group. The longer, mid-length gas system allows for a smoother gas curve which leads to managed dwell times. This combo creates a great balance of speed and performance.

  • Barrel Length: 16"
  • Weight: 28.97 oz.
  • Material: 4150 Chrome Moly Vanadium
  • Chamber: 5.56mm
  • M4 Feed Ramps: Yes
  • Profile: M4
  • Twist Rate: 1 in 7"
  • Gas Block Journal Size: .750"
  • Gas System length: Mid-Length
  • Muzzle Crown: 11 Degrees
  • Muzzle Thread Pattern: 1/2" x 28
  • Finish: Nitride

Yankee Hill Machine Co., Inc. does not offer for sale any controlled product (serialized parts) directly to the end user. This includes Complete YHM-15s, Sound Suppressors, and Lower Receivers. Follow these steps when purchasing to ensure that you receive your order as quickly as possible.

1. Visit (or call) your local firearms dealer and tell them exactly what model number you are looking for (If ordering a sound suppressor keep in mind the dealer needs to be a Class 3 dealer). If your dealer of choice does not currently a offer YHM products don't worry. They can easily become a YHM dealer.

2. IMPORTANT NOTE: EVEN IF A PRODUCT IS OUT OF STOCK ONLINE, DEALERS CAN BACK ORDER THE ITEM AT ANY TIME. Placing your order through a dealer gets you on the back order list and ensures that you will receive your product in the fastest manner possible. This can be applied to any item you are looking for on the website.

Once the order is placed, as soon as the product is ready to go out the door the dealer will be notified and the product will be on its way.

3. Once the dealer receives your order they should contact you to come and pick it up.

Manufacturers Disclaimer:
You, the purchaser are responsible to know your local, regional, state and federal firearms regulations regarding assault rifles and NFA weapons (Such as sound suppressors and short barreled rifles) when purchasing our products. Some of our products in this catalog require a Federal Firearms License and/or S.O.T for purchase.

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