The Walther PPQ Classic Q4 Tactical is a 9mm semi-automatic pistol with a 4.6-inch threaded barrel, designed for use with suppressors and muzzle devices. The Q4 designation refers to the 4.6-inch barrel version within the PPQ line. 
 

Key Specifications: 

• Manufacturer: Walther 
• Model: PPQ Classic Q4 Tactical 
• Caliber: 9mm Luger 
• Barrel Length: 4.6 inches 
• Capacity: 15+1 rounds 
• Weight: 25 oz (approximately 1.56 lbs) 
• Action Type: Single Action / Double Action (SA/DA) 
• Frame Material: Polymer with Black Finish 
• Slide Description: Black Steel 
• Grips: Black Interchangeable Backstrap 
• Safety Features: Firing Pin Safety 
• Sights Configuration: Fiber Optic Front Sight, Adjustable Rear Sight 
   

Detailed Features: 

 
The PPQ trigger is one of the more consistently praised factory triggers in the striker-fired market — short reset and a relatively light, consistent pull. Walther's reputation in this segment is built largely on that trigger. 
 
The threaded barrel allows direct suppressor attachment without an adapter. The fiber optic front sight and adjustable rear give you a usable sight picture out of the box. Interchangeable backstraps let you fit the grip to your hand without aftermarket parts. 
 
The firing pin safety is passive — no manual external safety to manage. At 25 oz loaded with an empty magazine, it's on the heavier side of the full-size polymer pistol segment. 
 

Usage Scenarios 

• Suppressor host: The threaded barrel is the main differentiator here. The 4.6-inch barrel offers more space for the suppressor stack. 
• Competitive shooting: The trigger and adjustable sights make it a reasonable choice for USPSA or similar competitions where a stock gun is required. 
• Range and home defense: 15+1 capacity, reliable function, and good accuracy at distance.

The Walther PPQ Q4 Tactical draws consistent positive feedback, especially on the trigger, with a few honest caveats.

The trigger gets mentioned in nearly every positive review. Shooters who come from Glock or M&P platforms often note that the PPQ trigger is noticeably smoother and has a shorter reset. Accuracy gets high marks, and users find the fiber optic sights easy to pick up quickly. Build quality is considered solid, and reliability complaints are uncommon.

Ergonomics are frequently cited as a plus. The grip texture and overall feel work well for most hand sizes, and the interchangeable backstraps extend that fit to a wider range of shooters. The threaded barrel draws positive attention from suppressor owners.

The most common criticism is size. At 25 oz with a 4.6-inch barrel, it's on the larger end for a carry gun, and several buyers note that it's better suited to a range or competition role than everyday concealed carry. Price is occasionally flagged as higher than comparable striker-fired pistols, though most who buy it consider the trigger quality worth the difference. Magazine capacity at the standard 15+1 is adequate but comes up occasionally from buyers who want more without a grip extension.