I've been looking for chokes for my Baikal MP153 I looked at the "wad waziard" and "patternmaster" The cost is terriable on both the idea sounds good but the price.The looked at extended and ported about half the cost of the other but is the extra wear worth it? We have all fallen in love with the guns,all 12ga,28" semi auto 3.5's.From shooting winchesters,brownings,and remingtons,there is no comparison IMHO.