The Grand Power X-Calibur CO Mk23 Match is a semi-automatic 9mm pistol with a 4.8-inch stainless barrel and 15-round capacity. The black steel slide has lightening cuts, an optic cut, and serrated surfaces. The black steel frame has a Picatinny rail and textured grip panels. 
 

Key Specifications 

• Brand: Grand Power 
• Model: X-Calibur CO Mk23 Match 
• Caliber: 9mm 
• Action: Semi Auto 
• Capacity: 15 
• Barrel Length: 4.8 inches 
• Color/Finish: Black 
   

Detailed Features 

• 4.8-inch stainless barrel 
• Black steel slide with lightening cuts and serrations 
• Optic cut for direct optic mounting 
• Picatinny rail on black steel frame 
• Textured grip panels

The Grand Power X-Calibur CO Mk23 Match attracts competitive shooters and collectors interested in European-production pistols built for precision work. Owners praise the stainless barrel quality and the optic-cut slide as practical for a dedicated competition or range build. The Picatinny rail is seen as useful for those who run a weapon-mounted light.

Trigger feel divides opinion somewhat. Most owners report a serviceable pull with a clean break, but some find the reset less tactile than competing domestic options. The aggressive slide serrations and overall machining quality receive consistently positive feedback.

The most common concern among X-Calibur CO Mk23 owners is US-market parts and support availability. Grand Power has a smaller US dealer footprint than major manufacturers, and owners note that spare parts and accessories can require advance planning. The 15-round capacity is generally considered sufficient for the pistol's intended role.