Very useful on your scopes for airsoft, milsim/ woodsball paintball, or real steel guns.
Eliminates the need to take the time to remove individual caps and store them, but rather both as a unit, or to let them hang on the rail mounts for ease of access.
Step 1: The Materials
-some nylon elastic cord or paracord if you can't find the former!
-hobby knife or exacto knife