i have a stainless ultra with the fluted barrel from gunbroker. i picked up the optima/kodiax/wolf breech plug and shimmed it by pressing 3 #2 washers in the primer pocket. this worked perfect for the win 209 primers. i put a scope on as the cheap plastic sights were unusable. i fired 4 3shot groups plus one to get on the paper for a couple 3/4" groups at 50 yards. seems like a keeper.i would like to replace the iron sights with something made out of metal and am looking for suggestions. i looked at the williams cva muzzleloader sights, will the ones for the cva round receiver fit?