Hoping someone can shed some light on my dilemma. I have a Universal M1 Carbine. I field stripped it but cannot seem to get the gas system pin removed. The manual says to "drift" it out with a punch, but I have hammered and hammered that thing and it won't budge. I cannot get to the gas plug with this pin in place. Anyone have experience with this brand of carbine? Also, anyone know where I can get spare parts for it? thanks...