Daniel Defense builds this upper receiver group to the MK18 pattern, the short 10.3-inch barreled configuration originally developed for close-quarters military use. It ships with the RIS II rail, a proven quad-rail system that remains a standard for mounting lights, lasers and grips where absolute rigidity matters more than slim profile.

Chambered in 5.56mm, it is a complete upper assembly intended to mate to a compatible lower, giving you Daniel Defense cold hammer forged barrel quality and the company's reputation for tight tolerances. Note that barrel length carries legal requirements depending on the receiver it is mounted to.

In stock and ready to ship straight to your door from Dawson Defense, an Arizona-owned licensed dealer.