Smith & Wesson Governor, Double/Single Action, Metal Frame Revolver, Z-Frame, 410 Gauge, 2.5 Chamber, 2.75 Barrel, 45 ACP, 45 Long Colt, Scandium Alloy, Matte Finish, Black, Synthetic Grips, Tritium Night Sights, 6 Rounds 162410 Versatile. Lightweight. The Smith & Wesson Governor revolver puts six rounds of customizable response under your control. Load with .410 2 1/2" shotshells, .45 ACP or .45 Colt - alone or in combination with the included moon clips - and hit your target in every situation. Plus, it's from the leading expert in revolver manufacturing over the past 159 years.