I found this needle bayonet in a pawn shop yesterday. At first glance I thought it was for a Trapdoor rifle. It is about the same length as my trapdoor bayonet, has 4 groves on the needle part, but the way it locks to the rifle is very different. I got the best pictures of the locking mechanism that I could. It was priced at $25 with no scabbard. I don't know if this is a good deal or not until I figure out what it goes on. Any thoughts?