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. 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.