The HK P30SK is a DA/SA subcompact 9mm pistol with a 3.27-inch barrel and 15+1 capacity. It weighs 23.99 oz unloaded and measures 6.42 inches overall. The frame is black polymer with interchangeable backstraps, and the slide is matte stainless. Night sights are integrated. 
 

Key Specifications 

• Brand: HK (Heckler & Koch) 
• Model: P30SK 
• Caliber: 9mm Luger 
• Action Type: Double Action / Single Action (DA/SA) 
• Capacity: 15+1 rounds 
• Barrel Length: 3.27 inches 
• Overall Length: 6.42 inches 
• Grip Material: Black Interchangeable Backstrap 
• Safety Features: Firing Pin / Hammer Safety 
• Finish: Black polymer frame / Matte stainless slide 
• Weight: 23.99 oz 
   

Detailed Features 

The interchangeable backstraps let you adjust grip circumference -- useful for a subcompact where a proper fit affects both comfort and accuracy. The ambidextrous controls (mag release, safety) work for left-handed shooters without modification. 
 
The DA/SA action runs the first shot in double-action with a longer, heavier pull, then transitions to single-action for follow-up shots. The hammer-fired system with visible external hammer gives you a clear indication of the gun's state. Night sights allow use in low-light without a weapon light. 
 
HK's paddle magazine release, positioned at the front of the trigger guard, is standard on this model -- the same interface as the full-size P30. 
 

Usage 

The P30SK packs 15+1 rounds into a subcompact package by using a flush-fit extended magazine. With a standard flush-fit magazine the count is lower, so verify the included magazine configuration for your intended carry setup. The 3.27-inch barrel is shorter than compact options but the DA/SA action and night sights give it a complete defensive configuration from the factory. As with the full-size P30, the paddle release requires adaptation from button-release shooters.

P30SK owners consistently praise the build quality and the ergonomics -- HK's interchangeable backstrap system fits more hand sizes than fixed-grip subcompacts, and the night sights from the factory are appreciated for a carry gun.

The DA/SA action is the feature that polarizes buyers the most. Experienced DA/SA shooters value the system's safety margin and the lighter SA pull for follow-up shots. Shooters used to striker-fired pistols find the heavier DA first shot requires deliberate practice to shoot consistently, and some prefer the simpler striker pull for a carry gun.

Capacity for a subcompact at 15+1 is frequently mentioned as a major positive, and the overall accuracy at defensive distances gets good marks.

Criticism clusters around three areas: the paddle magazine release requires retraining, the price is higher than competing subcompacts, and holster availability is more limited than for Glock 43/43X or SIG P365 alternatives, which affects daily carry practicality. Size is occasionally flagged as larger than expected for a 'subcompact' designation.