The Walther PDP F-Series Pro with a 4" barrel brings duty-grade performance in a compact, optic-ready platform built for law enforcement, security details, and serious defensive shooters; the slide is milled for the Aimpoint ACRO to deliver fast red dot acquisition and the textured serrations aid press checks and slide manipulations under stress, while the 9mm Luger 18+1 capacity and semi-auto action provide sustained firepower for patrol, range training, and home defense scenarios. The PDP line is designed around shooter-focused ergonomics, with interchangeable backstraps and a grip texture that promotes consistent sight alignment and recoil control for rapid follow-up shots, and the 4" barrel strikes a balance between sight radius and duty carry. The black frame finish and rugged construction stand up to heavy use, and the optic-ready slide eliminates the need for aftermarket milling for ACRO-type red dots. This handgun requires FFL transfer and suits users seeking a service-capable, optic-equipped semi-auto pistol for professional duty, security assignments, competitive practice, or defensive ownership. Keywords: Walther PDP, ACROCompact, duty pistol, 9mm, optic ready, semi auto pistol.