I'm new to shooting and this forum. I have a .50 cal Renegade and have had a good time target shooting with round balls in my back yard and would like to go after the deer that are so numerous in this area. The problem is that my eyes are no longer good enough for open sights. I bought a scope adapter from Thompson and according to them to mount this adapter the rear sight needs to be taken off. I'm pretty handy but can't seem to figure out how to dismount this rear sight. Can't seem to reach anyone at Thompson. Can anybody help? Thanks. Any recommendations for a scope for short range New England conditions?