This is a weapon safe flag I created for 338 Lapua firearms for range days. Its not a good idea to leave weapons unattended but on large range days with multiple people firing multiple weapons, its a nice way of signaling to people that a weapon is not chambered and rendered safe to avoid confusion and lower risk. This flag can be placed in the bolt assembly and will stick out visibly noticable if of course printed in a bright color. I typically go with red/white but you can use your own preference.