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Has anyone ever seen this knife before and can it really be used on a bayonet? It is said that it can fit together with a AK47 rifle. Maybe it is a copy of some old military knife that was used back in one of the wars? The website that it is on is lducompany I am wondering if it can fit on any other types of guns or rifles. Does it look like something that would be used by Chinese, Koreans, or Russians. Here is a link to the knives page liangdian and it is the knife with the number 406023 right at the top of the page.Any help would be appreciated before I order it all the way from China