These sights will not fit your PDP. However, AmeriGlo does make sights compatible with the PDP. You can find them using the following link.
https://www.opticsplanet.com/ameriglo-trooper-sets-for-walther-pdp.html
Yes. The Trijicon Bright & Tough Night Sights will fit your Walther PPQ in .45acp. It also fits the Walther P99.
No it can not.
The PPQ SC actually uses the PPS sights
These will fit that firearm.
These sights are not compatible with the Walther CCP. Please email us at techsales@opticsplanet.com and we can look into other possible options for you.
Assuming you meant the Walther PPQ M2 and not the W2, these sights will work.
All of the sights listed under part number WP01 will fit the Walther P99, PPQ and PPQ M2.
Yes these are compatible with P99 Compact, the sight picture should not be effected as the full size and compact use the same sights.
Trijicon designs the sights so that your front sight should cover the bullseye on your target rather than sitting just below it. That said, every firearm is different, so point of impact may not be exact. Typically you would want to have your sights installed and sighted in properly by a gunsmith to ensure proper accuracy.