STI Eagle 5.1 in 45 ACP. Built on the STI 2011 modular frame, the 45 ACP Eagle 5.1 offered 1911 purists the accuracy and trigger of the 1911 format with higher magazine capacity. Less common in IPSC Open division compared to the 40 S&W and 9mm variants but widely used in USPSA Limited and Classic divisions. Type: Pistol Action: Semi-Automatic Caliber: 45 ACP Capacity: 14 Year introduced: 1994, USA Weight: 40 oz Overall length: 9" Status: Discontinued Intended use: IPSC Limited, USPSA Limited, Competition