The McFadden Lightnin' Grip Loader is designed to speed up the loading process for .22 LR magazines and prevent sore thumbs.
A variety of adapters are available to fit different .22 LR firearms, including popular models like the Smith & Wesson M&P15-22, Ruger SR22, and Kimber 1911-22 conversion kits.
The product is specific to Marlin firearms in .22 caliber and is manufactured by McFadden Machine Co. Inc., falling under the category of Magazine Speedloaders.