I'd probably start with a PPQ Classic frame, as that was the derivative of the P99Q. Of course the trigger, disconnector, and related bits are not the same as a standard PPQ, though.
Try Earl Sheehan and see what he's got to say? I don't have his number, but if you googled him, you'll find ways to open a line of communication. In this case, I'd say he's highly likely to be the only course of action.
Now, how in hell did you come to possess a slide and barrel from a P99Q? LOL.
Unless it's from one of those places that buy turned-in guns, sell the parts not deemed a "gun", and destroy the part that "is" the "gun"...
I don't see anyone with any sense parting out a P99Q lol.
Either way, you're about 40% of a sought after gun. Hope you find the rest to make it at least in a firing state.
