Both right and left hand shooters can get faster, easier reloads while keeping the rifle on target. This distinctive design that is the same size and configuration as the factory part; won’t snag, resists accidental release and does not interfere with rifle function but allows you to activate the magazine release with the thumb of the non-firing hand. This drop-in installation is 100% designed and manufactured in the USA with a lifetime replacement warranty. Manufacturer of 12L14 Solid Billet Steel, it is compatible with all AR15/M4/M16 rifles. It installs the same as a factory magazine release, and utilizes the original magazine release button.