4GSK Supressor Overview 4GXT9 Extended Suppressor - KRISS High Precision Suppressors are full auto rated and deliver outstanding sound reduction and accuracy. More info 4GC9 Compact Suppressor - Compact form factory and lightweight aluminum k-type baffles make the 4GC9 ideal for handguns. More info 4GSK Suppressor - Designed specifically for the KRISS Vector, the 4GSK delivers superb sound suppression and accuracy. More info January 19, 2020