OPF-PDP v2, ACRO will NOT work on Walther PDP v1, as it is made for PDP v2 only. PDP v2 slides have a longer optics cut, the serial numbers start with FDL9203, FDM0001, FDN3124).
OPF-PDP, ACRO is only guaranteed to work with Aimpoint ACRO P1 and P2, and Steiner's MPS. We have not tested it with the cheap Chicom sights under different guises from various companies that purportedly use the ACRO footprint. We neither endorse, nor support their use on OPF-G, ACRO. For defense and duty, we also do not recommend P2 copies/clones.
OPF-PDP v2, ACRO is compatible with PDP-F.
The above V2 serial numbers made available by Walther are almost a year old, now please remove the cover plate and verify the version.