Smith & Wesson Governor revolver puts six rounds of customizable response under your control. Load with 410 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. Now that's confidence. Each Governor is packaged with (2) 6 round and (3) 2 round moon clips for use with 45 ACP. A moon clip is a ring-shaped or star-shaped piece of metal designed to hold multiple cartridges together as a unit for simultaneous insertion and extraction from a revolver cylinder.