The TandemKross Halo Charging Ring is a precision-engineered firearm accessory designed specifically for Ruger Mark III and Mark IV pistols in a sleek black finish.TandemKross Halo Charging Ring (Model: TK24N0164BLK1)Compatible with Ruger Mark III and Mark IV pistolsBlack anodized finish for durability and styleEnhanced charging handle functionalityPrecision machined constructionThis charging ring accessory provides improved manipulation and enhanced performance for Ruger Mark series pistol owners seeking reliable aftermarket upgrades.