Explosive Enterprises feature their AKS-74U gas blowback build that is based on a VFC AK74M GBB... "At the time of making this video, VFC only offers a GBBR AK-74M, which we extensively covered in a prior review. It turns out that with the right parts (and more effort than expected), it can be converted to a AKS-74U, Krinkov, Ksyusha, or whatever other nickname you prefer for the smallest Soviet AK."