A binary trigger works by firing one shot upon pulling. Unlike traditional triggers and binary triggers (sometimes referred to generally as. Webjan 30, 2024 · many folks confuse binary triggers with frts, but they are quite different, and atf has clearly defined why binary triggers are not machine guns or frts. Webaug 24, 2023 · the binary trigger, which allows a weapon to fire one round when the trigger is pulled and another when it is released, is legal in most states and at the federal.