The STI Spartan III is the third generation of the STI Spartan single-stack 1911, featuring an improved Novak-style rear sight, updated grip checkering, and an STI-tuned trigger with reduced take-up compared to earlier Spartan generations. Chambered in 45 ACP, it is the most common Spartan III caliber. Type: Pistol Action: Semi-Automatic Caliber: 45 ACP Capacity: 8 Year introduced: 2010, USA Weight: 35.5 oz Overall length: 8.5" Status: Discontinued Intended use: USPSA Single Stack, Service, Competition