Alternatively, maybe "50" refers to the caliber. But as mentioned, .50 is a huge caliber not used for hunting. Unless it's a .50 Action Express, but that's a rare caliber. Alternatively, the number 50 in model number, like the CZ 50 series. CZ does have a CZ 50 series of semi-automatic rifles. The CZ 50 series is a line of tactical rifles, but maybe there's a CZ 50 Hunter version. Let me think. CZ did make a CZ 50 series that includes the CZ 50 Tactical, CZ 50 Airsoft, and maybe a hunter version. If that's the case, then the CZ 50 Hunter could be a model. Alternatively, maybe they market a version for hunting.