Patent ID: 7735409
Filing Date: 2010-06-15
Classification: F41A,Y10T

Abstract:
1. A conversion kit for a RUGER® 10/22® semi-automatic .22 caliber rim fire firearm capable of shooting .22 caliber long rifle cartridges to shoot 17 Mach 2 (.17 caliber) cartridges that are nearly twice as fast and more accurate at longer ranges than .22 caliber long rifle cartridges, wherein the firearm has a bolt and a bolt operating handle of sufficient weight to safely fire, eject and reload a .22 caliber long rifle cartridge, and wherein the rifle has been converted to replace the standard barrel with a .17 caliber barrel for shooting 17 Mach 2 cartridges but will not safely fire, eject and reload the .17 caliber cartridges, comprising: (a) a second bolt-operating handle with increased weight to replace the first bolt operating handle to safely fire, eject and reload the .17 caliber cartridges; and (b) and external finger knob with increased weight of approximately 850 grains to approximately 1400 grains to the bolt.