>>1407996The current version of the Desert Eagle, the MiX IS, is modular. Since .44 Magnum and .50AE have the same diameter rim, they use the same bolt. Switching requires a barrel and mag swap which takes about five seconds. Six inch barrels run about $400 , magazines run about $40. Going to .357 Magnum from one of the big bore calibers requires a bolt change and field stripping the slide, which takes about two minutes with practice. Spare bolts are $200.