STI Hawk 4.3 in 45 ACP. Commander-length double-stack 2011 carry pistol in 45 ACP. The 45 ACP variant uses the wider 45 ACP magazine body and a specifically fitted barrel link for reliable function. More popular than the 9mm Hawk in the US civilian market. Type: Pistol Action: Semi-Automatic Caliber: 45 ACP Capacity: 10 Year introduced: 2006, USA Weight: 35 oz Overall length: 7.8" Status: Discontinued Intended use: CCW, Service, Duty