Any hopper on the market will work with a 'cocker, they have no compatibility issues known to me. If it's just a standard 'cocker, a revvy should be fine, as you probably aren't going to be shooting more than 13 bps. But if you've got an electro kit on it, it might be wise to invest in an Egg or HALO (don't even get that debate started, try 'em both, and see which you like. Bear in mind, HALO is faster, and has a better profile, egg is lighter and holds more balls)