Rifleman Review: Walther Arms PDP Pro-X PMM

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posted on June 10, 2026
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Walther Arms introduced its PDP line of striker-fired, polymer-framed handguns in 2021, and during the past five years, the company has expanded the line into every conceivable space, providing steel-framed, competition-oriented models, its female-focused F-Series and more. Recently, Walther has combined several PDP feature sets with a Parker Mountain Machine compensator to produce the Pro-X PMM. Watch our "American Rifleman Television: Rifleman Review" segment above to see the details of this unique, hybrid design.

"Now, if you haven't been paying attention, Walther has really flipped the script when it came out with its PDP series of guns. PDP standing for Performance Duty Pistol," American Hunter Shooting Editor Christopher Olsen said. "Now, this version of the PDP is kind of a crossover hybrid. It gives you the best of both worlds, meaning it's an optic-capable, competition-ready gun. At the same time, you can put this next to the bed stand or carry it concealed."

Chambered for the 9 mm Luger cartridge, the Walther PDP Pro-X PMM is equipped with a 4.6-inch barrel that is topped by a half-inch compensator affixed to the threaded muzzle, making the platform still concealable while adding recoil-reducing capability. The overall length of the gun comes in at 8.5 inches, while the height is 5.75 inches, and unloaded, the gun weighs 24 ounces.

"The Pro-X PMM version also offers upgrades you're not going to find elsewhere, and that's in the magazine-well funnel," Olsen said. "There's an aluminum unit attached to the bottom of the magazine well, and the magazines included from Walther also feature these aluminum baseplates. Now their standard capacity for the compact are 18 rounds, and the full-size units carry 20-round magazines."

At the top end of the gun, Walther includes a set of adjustable, three-dot sights that sit inside a Glock-pattern dovetail, opening up a wide aftermarket of options for those who want to customize their gun. Additionally, a milled slide offers the opportunity to mount a red-dot optic, and Walther includes a voucher with each PDP Pro-X PMM that allows owners to obtain a free adapter plate for their chosen optic.

"One of the things that Walther has done so well with the PDP series is just the user interface, the ergonomics of this gun," Olsen said. "You can really grab onto it, shoot it well and maintain your position shot after shot. And a lot of that has to do with the customization of it. Walther includes several backstraps, so you can tune the gun to how you want it to feel, and it's a really easy process."

One of the other highlights of the Walther PDP Pro-X PMM is the addition of the company's Dynamic Performance Trigger, which provides a clean trigger pull weighing in at 5 pounds, 3 ounces on our test sample.

"So if you're a fan of 9 mm pistols and want to get a red dot and run a compensated gun, the PMM is probably your best choice," Olsen said.

To watch complete segments of past episodes of American Rifleman TV, go to americanrifleman.org/videos/artv. For all-new episodes of ARTV, tune in Wednesday nights to Outdoor Channel 8:30 p.m. and 11:30 p.m. EST.

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