SIS Pro applies the LAPD SIS specification to the 4-inch Commander-size Pro frame — Picatinny rail, KimPro II black finish, front strap checkering, extended controls, and SIS-specific thumb safety in a more concealable format. Built for plainclothes LAPD SIS operators. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 7 Year introduced: 2007, USA Weight: 36 oz Overall length: 7.7" Status: Discontinued Intended use: duty, law_enforcement, carry