I bought a Stainless Steel Encore with Sythetic stocks in a Muzzle Loader for hunting moose in Alaska.
The rear sight is not stainless steel and due to a little corrision it stuck "down".
I missed a huge bull moose!
I took it off and threw it away. Then added a Weaver-type scope base along with a Leupold scope.
Since a scope is forbidden on some hunts I also added a New England Peep and new front sight of the proper height.
http://www.newenglandcustomgun.com/The peep is easy-on, easy-off.
I took a bull moose as well as a bull elk with the peep. Highly recommended.