Brownells is your source for Walther PDP Compact Parts at Brownells. Shop our vast selection and save! Enable Accessibility. 800-741-0015. Live Chat Live Chat. Facebook; Instagram; Help. Create an Account; ... PDP COMPACT. WALTHER ARMS. The PPQ (Police Pistol Quick Defense) has been Walther's semi-automatic vanguard for a long time and one of the most popular handguns in their arsenal. Now, the Walther PDP series steps in to succeed the former champion that has kept its unwavering reliability and use. This is a big business move by Walther because they're actually. Walther PDP Show Filters Showing the single result. Best Sellers, Holsters. PHLster Pro Series Holster ... Sig Aftermarket Parts (3) Sig Frames (8) Sights And Optics (288) Slings (32) Suppressor Accessories (55) Suppressors And Silencers (62) Tools (73) Triggers (29) Uncategorized (57) Upper Receivers (82).