The Drafter 30 is a .30 caliber can that can handle a plethora of cartridges. Light, quiet, gas reduction, and engineered to enhance your system, the Drafter 30 is one to rule them all. The can ships with both a 1/2x28 and 5/8x24 diret thread mount. While performance will be degraded using 5.56, it'll still do the job and enhance the kit you spent time and money putting together.