This Tannerite Single Target is compatible with centerfire rifles. With this target, you'll receive a catalyst pack and a mixing container to combine the compounds. Simply mix it up and put it in the clear jar with the blaze orange label. Once you have positioned your target, take your shot. The target won't activate unless hit at 2,000 FPS. You'll know the moment your shot is successful. This target has a shelf life of 10 years, so stock up now.