So a friend gave me this barrel, doesn't know what it goes to, neither do I. I believe it's a 10/22 barrel, maybe to a charger or a modified ruger 10/22? Not sure. It has an end piece that screws off. Also of note, a .22 bullet fits into one end, but won't fit into the other, is it not .22? I can't imagine thats supposed to be like that? Forgive my ignorance, can anyone tell me for sure what it goes to, maybe it's worth? I will probably list it if I can properly identify it.