You can spend it on overpriced magazines, or you can donate it to a gun rights organization.
And hey, if you don’t want to give it to the Second Amendment Foundation, there’s always the NRA, the NRA-ILA, Gun Owners of America, the National Association for Gun Rights, the Firearms Policy Coalition and even Calguns and other large, local gun rights organizations.
Don’t forget to write your representatives. Don’t know who they are? Look ‘em up.