A trigger in binary manner employs two different sears. Following the trigger is pulled and a shot is fired, the hammer recocks plus the disconnector arrests the hammer to prevent automatic fire (similar to it does in semi-car mode). The BFSIII B&T-C1 is explicitly suitable for the B&T APC9 and https://hectorsmdwd.activoblog.com/35177230/detailed-notes-on-binary-trigger-glock