New Ultralight Arms Model 20 in 204 Ruger. Forbes added the 204 Ruger to the Model 20 lineup when Hornady introduced the cartridge in 2004, recognizing that its combination of high velocity and lower heat generation than the 17 Remington made it a practical ultralight varmint choice. At under 5 pounds in 204 Ruger, the Model 20 is the lightest available production rifle for the cartridge. Type: Rifle Action: Bolt-Action Caliber: 204 Ruger Capacity: 1 Year introduced: 2004, USA Weight: 52 oz Overall length: 40.5" Status: Active Intended use: varmint hunting