The Model 610 with 5-inch barrel is the longer hunting and target configuration of the N-frame 10mm revolver. The extra inch of barrel improves 10mm Auto velocity meaningfully — the cartridge was designed with a longer barrel in mind — and provides a better sight radius for the precision use this configuration is typically employed for. Type: Revolver Action: Double-Action Caliber: 10mm Auto Capacity: 6 Year introduced: 1990, USA Weight: 52 oz Overall length: 10.5" Status: Active Intended use: hunting, target, sporting