The Kriss Vector SDP-E is a semi-automatic pistol chambered in .45 ACP with a 6.5-inch threaded barrel, 13-round capacity, and a polymer frame finished in Flat Dark Earth (matte). It weighs 5.9 lbs. 
 

Key Specifications 

• Manufacturer: KRISS USA, Inc 
• Model: Vector SDP-E 
• Caliber: .45 ACP 
• Action Type: Semi-Automatic 
• Capacity: 13 Rounds 
• Barrel Length: 6.5 inches 
• Weight: 5.9 lbs 
• Finish Color: Flat Dark Earth (Matte) 
• Frame Material: Polymer 
   

Features 

 
The threaded barrel accepts suppressors or muzzle brakes without modification. Front and rear flip sights allow quick adjustments in different lighting conditions. The polymer frame keeps the overall weight manageable for a .45 ACP platform of this size, and the FDE matte finish cuts down on glare. 
 
Kriss built the Vector around a patented recoil mitigation system that redirects bolt mass downward rather than rearward. In practice, this noticeably reduces muzzle rise compared to a conventional .45 ACP pistol, which helps with faster follow-up shots. The 6.5-inch barrel also contributes to tighter groups at distance relative to a compact carry gun.

Owners and enthusiasts tend to respond to the Vector SDP-E with a mix of genuine enthusiasm for its engineering and measured skepticism on practical points.

The recoil mitigation system is the most-discussed feature. Most shooters who have fired it confirm that muzzle flip is noticeably lower than a standard .45 ACP, and the 6.5-inch barrel gets consistent praise for accuracy, with users reporting tight groupings at various distances. Ergonomics are generally rated positively; the controls fall naturally and the grip feels comfortable.

The 13-round capacity draws mixed takes. Some consider it a reasonable balance for the platform's size; others would prefer higher capacity given modern standards.

Reliability is mostly solid in user reports, though a minority note feeding or cycling hiccups, usually with specific ammo types. The price is a recurring topic. Opinions split on whether the premium over conventional .45 ACP pistols is justified, though the aftermarket for Vector accessories is active and growing, which many buyers factor in positively.