The STI Staccato-P DUO is a variant of the Staccato-P with a factory-installed C-More or comparable reflex optic as a complete system package. The DUO designation indicated the dual-purpose capability for both everyday carry and competition use. Produced in the final year of STI International branding before the Staccato rebrand. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 20 Year introduced: 2020, USA Weight: 37.5 oz Overall length: 8" Status: Discontinued Intended use: Service, CCW, Competition