As others have said the Q5 Match will fit the Vortex red dots using the Doctor plate.
The Canik should fit in the IDPA box without the Optic. It doesn;t fit in the IPSC box.
IDPA still has not decided on how they will deal with the size of Optic mounted pistols. It would make sense to ignore the height of the guns with the Optic mounted and just decide on what size of pistol you want in the Division. FS or Compact. To garner any amount of interest I would suggest they use the FS pistol as their benchmark based on SSP requirements. If they don't there would be little or no activity in Canada in the division. We shall see what IDPA God decides. Look for an answer in the coming months.
My bet, that I would not make, would be they go FS guns, and stick with SSP requirements as opposed to ESP. The latter rule set would give IDPA a quazzi OPen division and I doubt the powers that be want that.
I have already made my decision but for personal reasons not solely based on my desire to compete. For anyone looking at setting up a rig for IDPA or wants to shoot both IDPA and IPSC, neither sport has firmed up their rule set, yet. IPSC as I understand it won't make their decision until next year. IDPA says in the coming months. In Canada, IPSC has gone Production Optics, meaning any gun on the Approved Production list is approved now for participation in Canada. Sean might want to voice his opinion as to whether this will carry the vote next year or not.
If IDPA goes with the present FS box requirements, ignoring the height limitation when the gun has a mounted Optic both the Walther PPQ Q5 Match and the Canik would be legal. Considering the ongoing difficulties recently with writing rule books I would not bet as to how the final decision will come down. I doubt many would argue with that assessment.
Take care
Bob