The KRISS Vector SDP in .45 ACP delivers the unique downward recoil mitigation system with the heavy .45 ACP cartridge, making the already unique Vector even more distinctive in its largest standard caliber. Type: Pistol Action: Gas-Operated Caliber: .45 ACP Capacity: 13 Year introduced: 2016, USA Weight: 6.2 oz Overall length: 18.7" Status: Active Intended use: Home Defense, Collector, Tactical