No idea, but after Dawson told me it wasn't meant for the P2 and it has that tilt I don't want to use it. The tilt drives me crazy as it looks like I am not holding my gun correctly. I always thought my 509T had the same tilt until I looked at this Acro. I am trying to get my hands on a p-1 locking block to see if it fits and will make the optic lock to the plate correctly.