[6] In SHOT Show 2015, CMMG representatives have suggested the possibility that they can do a variant of the rifle based on the 5.45×39mm caliber.

[7] The Mk47 Mutant has an AR-10-sized bolt carrier,[8] which was enlarged, with a CMMG RKM KeyMod handguard[3][5] and an upper/lower receiver manufactured from 7075-T6 billet aluminum.

[2] The rifle has an AR-15-based pistol grip, safety selector, trigger group and a buffer tube.

The following variants are made by CMMG:[8][2] The Mk47 underwent several tests in reliability, being manageable to handle, especially with a suppressor.

[16] Shooting Illustrated mentioned that the only thing the rifle needs is something to hold the bolt open so that the shooter or someone can see that the weapon is not loaded.