This is the same feed system found on the A-5 and now it is available for your Tippmann 98 Custom or Pro! Will also work with the new Alpha series markers! (Requires minor modifications) The Cyclone Feed System links the feeder sprocket to the air system for synchronized ball feed for reduced breakage and jamming. It feeds up to 15 balls per second and includes a wide mouth 200 Round Hopper that attaches via quick release elbow. This can be installed with the RT but you do need an RT adapter which is not included.