I purchased this years ago and am wondering what the heck it is. Obviously an AK flat of some sort but not sure what country, etc. A 7.62 AK mag doesn’t seem to fit but a 5.45 mag seems to fit well (pictured) so maybe it’s an AK74? I think it’s an underfolder based on those holes? Don’t worry, I know I can’t do anything with it but I’d still like to learn a little bit about it.