I kinda lost track of all the versions of the Canik 55 TP9. The early, 18 round TP9 mags would absolutely fit perfectly into a PPQ M2....and the early magazine baseplate also fit the PPQ like it was made for it.
Somewhere along the line, they changed a few things. I suspect they made the pistol grip/magwell a little longer, requiring a modification to the original magazine baseplate design. The later models (don't ask me which one, as I have the originals) as I understand it, will still insert and lock into place in a PPQ M2, but the baseplate will not be flush with the bottom of the pistol grip....in other words, it'll be hanging out a little. Which brings up the real problem of being able to over insert the mags, with NOTHING to stop the over insertion except the EJECTOR.......that's not good either.
Does all that make any sense?
Here's one of the original TP9 mags inserted in one of my PPQ's. Notice how the baseplate fits nicely up against the bottom of the grip?
This is the same Canik 55 TP9 18 round magazine with factory baseplate removed and replaced with a Mc-Gar Plus-2 baseplate. I just need to make a sleeve to slide down the mag body to take up the empty space and provide a 'positive' stop....to eliminate 'over insertion'.
And, here's the sleeve.