TandemKross Green Springs Features The TandemKross Green Springs are shot-peened during manufacturing a process that significantly extends spring life compared to the factory spring originally installed in Ruger Mark Series magazines. As factory springs wear down over repeated use magazines begin to suffer failure-to-feed issues that can interrupt a shooting sports competition or a routine range session. Replacing a tired or broken factory spring with a Green Spring restores reliable feeding and helps the magazine perform the way it did when new. Because they come sold in a 3-pack shooters running multiple magazines can refresh their entire set in one purchase. Keeping a 3-pack of Green Springs in a range bag makes for easy on-the-go maintenance whenever a magazine starts acting up during a shooting session. The dark green coloring of the springs offers a simple visual way to show TandemKross upgrade pride while also keeping upgraded springs clearly separated from factory originals in storage. This color-coding helps prevent accidentally mixing old and new springs when performing maintenance on several magazines at once. Built specifically as a drop-in replacement for Ruger Mark Series magazines these TandemKross Green Springs are available for sale at GrabAGun. TANDEMKROSS Green Springs Specifications Manufacturer: TANDEMKROSS Model: Green Springs Compatible Hosts: Ruger Mark Series Color: Green Quantity: 3 Pack Weight: 0.30 oz Available At: GrabAGun