Walther is releasing 4.6" Threaded Barrel 9mm kit. It can be used for both PPQ classic(4") or M2. It has 1/2"x28 TPI threads. Price is $229
http://store.waltherarms.com/pistol-accessories/ppq-m2-4-6-threaded-barrel-polygon-9mm-kit.html
Also, Q5 Match is now on the USPSA Production list.
From:
Shooting Wire