The HK 45 replaced the USP .45 in HK's service pistol line with a more ergonomic grip, improved trigger, and a lower bore axis. Designed with input from US military end users. Type: Semi-Auto Pistol Action: Double-Action/Single-Action Caliber: .45 ACP Capacity: 10 Year introduced: 2007, Germany Weight: 29.12 oz Overall length: 7.52" Status: Active Intended use: duty, service