The HK4 is H&K's first pistol, a Walther PP-influenced straight blowback design chambered initially in .32 ACP with conversion kits available for .380 ACP, .22 LR, and .25 ACP. DA/SA trigger with a decocking safety. The .32 ACP version was the most widely distributed of the HK4 chamberings. Type: Pistol Action: Semi-Automatic Caliber: .32 ACP Capacity: 8 Year introduced: 1967, Germany Weight: 18 oz Overall length: 6" Status: Discontinued Intended use: law_enforcement, concealed_carry, service