Ruger Mark IV 22/45 Lite. Upgrades: Volquartsen Ultimate Trigger kit ( sear and hammer ) Tandemkross Victory Trigger, Game Changer Compensator, Halo Bolt Charger, Holster and Magazine Pouches. Stoner Grips Allchin Mount C-More Railway Sight with 12 Minute Dot. Trigger is set at a nice, crisp 1.5 pounds. This is my Steel Challenge gun.