Something I didn't see mentioned regarding m203s so I thought I would: the price of the launcher is nothing compared to the cost of the shells. The price that Disco_Dante quoted is correct, $200-400 for the launcher is about right. But the major cost in running 40mm launcher is in the shells. You're going to be paying at least $70 a pop for them. More if you want the HP co2 ones. Shells will end up costing half again more then the launcher itself. So if you want a figure to aim for in saving it should be at least $500 and probably more like $700 for the launcher and shells together. As in all gas powered stuff, it doesn't pay to cheap-out on shells, Madbull or nothing.