This short action chamber flag has some features we really love. Prevents mags from being inserted unless the flag is removed and the ability to add a chiller on those hot days! FeaturesDetects round left in chamber.Prohibits AICS magazines from loading when flag is in place, (AW mags when bolt is pulled back).AICS magazines must be removed for flag to go into chamber (AW mags when bolt is pulled back).Prevents leaving magazine in rifle when flag is inserted.One hand insertion and removal.Fits short actions.