Thanks to the folks who helped me out while I was figuring out what barrel I was going to order for my CZ 457. Today I ordered a 22lr, Bartlein, 22 inch, bull barrel with a Bartlein Match Chamber. I plan on putting it in a KRG Bravo chassis. Since the Bravo has a recessed mag well I orderd the DIP extended mag release and their 22LR adapter Since I as paying for shipping anyway I oreder the metal mag well and a new knob. Maybe I can shoot it before halloween