I dont know if it fits, but I do know that its garbage. I used one for boot and IWB for about a week and a half with a TDI and it loses its tension in about a day, I got tired of bending it back with pliers every day and shortly after gave up entirely on the TDI. If you buy it, you'll be sorry, whether it fits the 5/6 or not.
Just measured it, the holes are just under 2 inches apart horizontally, I don't have a 5 or 6 but I'd assume the blade is wider than that? Hope this helps.