The HPS 4GSK Suppressor made for the KRISS Vector .45 SMG is now finally released by Defiance. This has been announced previously by KRISS Systems and it will fit all KRISS SMG, SBR, and SDP versions as this supports M16X LH threaded .45 ACP models. Now, with the imminent release of the KWA KRISS Vector Gas Blowback SMG, you might wonder if a version for airsoft use would be released.