I have a Walther PPQ M2 Navy SD and am waiting for ATF to approve my AAC Ti-RANT suppressor. I could not find any sights that are high enough to see over the can, so I am having Dawson Precision make me custom height sights. They are charging me $10 over regular price per sight and about 4 weeks to make them. I decided that I wanted to stay with original sight picture (with 0.180" high front and 0.210" high rear sights). The AAC Ti-Rant is listed as 1.38" in diameter. Based on that, my calculations for custom sights are 0.300" high front and 0.330" high rear. I will post my measurements and calculations later, and hopefully an install video and review of the sights when I get them. I went with fiber optic front and black charger rear.