The Grand Power K100 is a 9mm Luger (9x19 Para) semi-automatic pistol with a single/double action trigger. The barrel is 4.25 inches and capacity is 15 rounds. The finish is black. The rotating barrel system is a distinctive mechanical feature of the K100 platform. It differs from the tilting-barrel Browning system used in most modern semi-autos and contributes to the gun's recoil characteristics. 
 

Key Specifications 

• UPC: 8588005808019 
• Action: Single/Double Action 
• Barrel Length: 4.25 inches 
• Caliber: 9mm Luger (9x19 Para) 
• Capacity: 15 rounds 
• Finish: Black 
   

Detailed Features 

The DA/SA trigger gives a heavier first-shot pull in double action with lighter follow-up shots in single action, a traditional European service pistol approach. The 4.25" barrel handles most standard 9mm loads without issue. The 15-round capacity is competitive for the size class. 
 

Target Audience 

Suited for home defense, range use, and competition shooters who are comfortable with a DA/SA trigger. The K100 is a less common platform in the US market, which appeals to some buyers who want something outside the Glock/M&P mainstream. 
 

Usage Scenarios 

• Home defense: 15-round capacity and reliable 9mm performance. 
• Range and sport shooting: accurate enough for competition work. 
• Training with a DA/SA platform for shooters building trigger discipline.

The Grand Power K100 gets broadly positive reviews from owners who specifically sought out the rotating barrel design and DA/SA action. The ergonomics draw consistent praise. The grip is comfortable and handling is straightforward. The 15-round capacity and black finish are practical positives that come up in most reviews. Most owners find performance at the range to be good.

The criticisms are real and worth knowing. Aftermarket parts and accessories are more limited than for mainstream US platforms like Glocks or M&Ps. Holsters, magazine extensions, and support parts require more effort to source. Some users mention reliability inconsistencies in certain conditions, though experiences vary. The Grand Power brand is less familiar in the US market, which affects some buyers' confidence regardless of actual performance.