>>8494846The Rapidstrike uses a motorized pusher and is very underwhelming in stock form but becomes much better after modding.
Later models like the Hyperfire, Infinus and Turbine use a motorized conveyor belt that pulls the darts into the flywheels (it was first seen in the Rival Khaos IIRC). Stock, they're about as fast as a Rapidstrike pusher on a 2S or IMRs. After modding, the fire rate is ridiculous and they can dump entire 18 sticks in less than a second. (see Walcom's Deleter)
Select-fire kits are available for the Stryfe with a full-auto mode in addition to three-shot burst and semi-auto.