Pistols Overview VECTOR SDP Vector SDP - The smallest and lightest form factor of the KRISS Vector. The SDP is ideal for personal defense and home protection. More info Vector SDP Enhanced - The smallest and lightest form factor of the KRISS Vector. The SDP is ideal for personal defense and home protection. More info SPHINX SDP SPHINX SDP Compact - Competition grade accuracy with combat level reliability, the SPHINX SDP raises the bar for performance duty pistols. More info SPHINX SDP Duty - Competition grade accuracy with combat level reliability, the SPHINX SDP raises the bar for performance duty pistols. More info January 17, 2020