Wildcat MkII

I have a wc3 with a plenum and the superior liner and it shoots the knockout slugs the best over all other slugs and pellets. H&n slugs close second. And there isn't a lot of difference between the two. I would say add a plenum and get either a slug liner or a superior liner and it would be a slug shooting machine. And if you're only going to shoot 22 you may not even need the plenum if you can achieve the velocity you want

mk3 comes with superior liner. both the 500 and 700 barrels shoot well out past 100 yards with the 25gr and 34gr pellets.I have both mk2 500mm in .22 and mk3 700mm .25cal. I'm happy with both guns and both have added plenum. I wouldn't hesitate recommending the Wildcat platform