got that rear sight i ordered the one that was on it was a bugger to get off and the new was as hard to get on. it is a marbles high buck horn i can really see this one great easy line up.you can get one from
www.longhunt.com they have several different types.this gun was pretty tight when i got it had not been fired. oiled it and cycled it about 200 times. shot it around 60 times its easy to cycle now.