Originally Posted by bluzman
But there isn't an 28.6" Ultra Lux barrel, which is what the OP wants, being offered at Midway either. Just sayin'.
on CZ-USA's site, it clearly shows the Ultra Lux as being the Model 455, as it was previously offered as a Model 452, which CZ is phasing our the Model 452 and all models and version will end up being offered as Model 455's. and according to their site, the Model 455 Ultra Lux has the longer 28" barrel and also features the interchangeable barrel system as the other Model 455's.
so the if Bud's has a 452 Ultra Lux, it's an older version of the Ultra Lux and i'm not sure if the barrel systems are the same as the 455.
if the OP wants to be able to change out barrels on a Training Rifle, with one from an Ultra Lux, then he probably needs to get the newer 455 model and a barrel from an Ultra Lux that fits the 455 model.
a link from CZ-USA showing the current models of the 455 Ultra Lux.