The AK-pattern rifle has enjoyed a very stable level of sustainability in the U.S. market for quite some time now. It is not a resurgence because it never went away, but nothing has seemed to catapult AK rifles over AR-pattern rifles. The cartridge ubiquitous with all things AK, the 7.62X39mm, has continued to grow steadily due to a large contingency of AR-pattern rifles being produced in the caliber, with some manufacturers going so far as to make custom hybrid lower which accept AK magazines. Cool.