The KRISS Vector Gen II uses a patented Diagonally-Driven System that diverts recoil forces downward and rearward rather than straight back, dramatically reducing muzzle rise in the heavy .45 ACP. Type: .45 ACP Action: Semi-Automatic Caliber: 45 ACP Capacity: 13 Year introduced: 2009, USA Weight: 85 oz Overall length: 16.5" Status: Active Intended use: Tactical, Law Enforcement, Competition