The reason I was asking is because I have GENUINE para high caps and after a few thousand rounds, the followers start to stick and the slide lock starts to not work. Not a big problem in ipsc, but I also use the gun for idpa and I was just looking for something to replace my worn out para high caps with. I was just trying to find out what I need to use the sti tubes. I have heard that they were better, but since I have just spent a lot of money converting all of my old mags to dawson basepads, I wanted to know if the sti tubes need dawsons sti basepads or the dawson para base pads. Thanks again for your help