safety catch
From Longman Dictionary of Contemporary EnglishRelated topics: Weaponssafety catchˈsafety catch noun [countable] British English PMWa lock on a gun that stops anyone from shooting it by accident SYN safety American EnglishExamples from the Corpussafety catch• It came clear from the bag, her finger slipping on to the trigger, thumb freeing the safety catch.• He pulled the trigger, believing that the safety catch was on.• He thought the safety catch was on.