The Walther PPQ Q4 Steel Frame is a full-steel 9mm semi-automatic pistol designed around competitive and tactical use. It has a 4-inch barrel, optics mounting system built into the slide, and a Picatinny rail under the barrel. At 40 oz empty it's notably heavier than polymer-framed alternatives. 
 

Key Specifications 

• Brand: Walther Arms 
• Model: PPQ M2 Q4 Tactical 
• Caliber: 9mm Luger (9x19 Para) 
• Action: Striker Fired 
• Capacity: 15+1 rounds 
• Barrel Length: 4 inches 
• Overall Length: 7.40 inches 
• Weight: 40 oz (empty magazine) 
• Frame Material: Steel with Tenifer finish 
• Grip Material: Black Polymer 
• Sights Configuration: Fixed Front / Adjustable Rear 
   

Detailed Features 

The 5.6 lb trigger pull is light for a striker-fired pistol, with short travel and a quick reset — designed to support fast, accurate fire. The wrap-around polymer grip panel gives good coverage and texture. An integrated optics mounting system on the slide eliminates the need for an adapter plate. The extended MIL-STD-1913 Picatinny rail under the barrel accepts standard lights and lasers. Tenifer coating on the frame, slide, and barrel provides corrosion resistance. Both the magazine release and slide stop are ambidextrous.

The Walther PPQ Q4 Tactical 9mm Steel gets positive marks for performance with some practical caveats that come up consistently.

Ergonomics are well-regarded. The grip texture gives solid purchase and the layout feels natural. Trigger quality is a regular highlight — owners describe the pull as smooth and crisp with a short reset, which translates to practical accuracy benefits.

The built-in optics mounting system is a genuine draw for competitive shooters who don't want to deal with adapters. Users report good results mounting red dots and using the pistol in timed drills.

Accuracy and build quality both get strong marks. The steel construction adds heft but also contributes to stability.

At 40 oz the Q4 is heavy. That weight is a non-issue on a competition stage but noticeable for anyone considering it for everyday carry. The pistol skews toward range and competitive use, and most owners buy it with that in mind.

Price comes up as a discussion point. The Q4 Steel costs more than comparable polymer-framed pistols, and buyers generally conclude the quality justifies it, though some note the gap is significant. Holster selection is narrower than for more common models.