The SME Pistol Chamber Safety Flag fits into the chamber of a semi-auto pistol, rifle, or shotgun to indicate the weapon is unloaded and safe during storage or training. The end of the flag can be used as a non-marring pin punch to push out takedown/pivot pins on an AR-15/M16 or trigger pins on other guns. The flat edge of the flag head can be used on scope windage and elevation knobs instead of a slot head screwdriver.