The HK VP9 in 9mm is a full-size striker-fired pistol with a 4.09-inch barrel, 17+1 round capacity, and tritium night sights. It measures 7.34 inches overall and weighs 25.56 ounces. The frame is black polymer; the slide is serrated black steel. 
 

Key Specifications 

• Manufacturer: Heckler & Koch (HK) 
• Model: VP9 
• Caliber: 9mm Luger 
• Action: Striker Fire Semi-Auto 
• Capacity: 17+1 rounds 
• Barrel Length: 4.09 inches 
• Overall Length: 7.34 inches 
• Weight: 25.56 ounces (1.6 lbs) 
• Sights: Tritium Night Sights 
• Grip Type: Standard with interchangeable backstraps 
• Finish Color: Black polymer frame, serrated black steel slide 
   

Features 

The VP9 uses a striker-fired action with a consistent pull on every shot. Interchangeable backstraps let you fit the grip to your hand. Ambidextrous slide release and magazine release accommodate left-handed shooters. The tritium night sights work in low light without batteries or electronics. 
 
At 17+1 rounds in a 4.09-inch barrel package, this version of the VP9 runs a standard-capacity configuration compared to the 10+1 variant. The 25.56-ounce weight is reasonable for a full-size pistol at this barrel length.

The HK VP9 draws consistently positive owner feedback across most categories.

Ergonomics lead the praise. The grip is comfortable for a wide range of hand sizes, and the interchangeable backstraps mean most shooters can get a solid fit without aftermarket work. This is one of the most frequently cited reasons buyers choose the VP9 over competitors.

Accuracy gets strong marks. Owners report tight groups at range distances, and the 4.09-inch barrel helps. The trigger is smooth with a short reset, which aids follow-up shots.

Build quality is well-regarded. HK's reputation for durable construction holds up in owner reports, and the guns are generally reliable across varied ammunition.

The tritium night sights get straightforward praise. They work in low light and most buyers are glad not to need an immediate sight upgrade.

Price is the main tension point. The VP9 sits at the higher end of striker-fired 9mm pistols. Most buyers who chose it consider the quality worth the cost, but a portion of discussions compare it to less expensive alternatives that get close in performance.