Don't have one, but I would replace the rear sight with a peep sight and handload for it. Looks like they can be had without permanently modding the firearm - check out Mojo sights. I'm sure there are others. I know a guy who put a peep sight on his AK47 (at the back of the receiver) and his handloads shoot into a .75 group at 75 yds. When loading for it, remember they use .311 or .312 diameter bullets. May want to slug your bore to determine actual size.