The USP Match is built around the USP Tactical (uses the same adjustable sights). So it uses the Tactical slide and a longer outer barrel, plus the compensator that is a rail attachment. The kit BioRage linked is used to convert a USP Tactical to a USP Match.
For a Shooters Design kit, here's a link, but out of stock:
http://shop.ehobbyasia.com/shooters-...-s7-black.html
The Ra-Tech slide for USP will work with the USP Match, but it's close to 300$. You're better getting the Shooters Design kit, or ordering replacement slides from KWA at this price.