The HK45 is HK's modern .45 ACP service pistol, combining the USP's proven mechanism with updated ergonomics from the P30/VP9 generation. The 4.53-inch barrel and 10-round magazine reflect the .45 ACP's dimensional constraints in a duty-size pistol. The HK45 features interchangeable backstraps, an integrated Picatinny rail, and the option for LEM or DA/SA triggers. A serious .45 ACP service pistol that competed for the US Army XM1158 contract. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 10 Year introduced: 2007, Germany Weight: 31.36 oz Overall length: 7.52" Status: Active Intended use: law_enforcement, service, military