I currently have a PPQ M2 4 inch, a PPQ SC M2 and a PPS M2. The PPQ SC and the PPS came with phosphorus sights on them. I changed out the sights on all 3 pistols with TruGlo TFX sights. I just ordered a PPQ 22 SD pistol from my local gun store, and am curious to find out if I could possibly change out the PPQ 22 sights with my phosphorus sights from my PPQ SC or my PPS. Do any of you know if they are interchangeable? Thank you in advance for your help.