The Geissele Super Select-Fire (SSFA(R)) Trigger is a select-fire combat trigger that Geissele Automatics developed for the U.S. Special Operations Community. The SSF is a non-adjustable combat style two-stage (single-stage in full-auto) trigger that is 4.5 lbs. total in semi-auto mode (2.5 lbs. first stage & 2.0 lbs. second stage). In full-auto, it is a Single Stage with a 6.0 lb. pull weight. In semi-automatic mode, the SSF is a precision two-stage trigger that allows precise and accurate trigger control. In fully-automatic mode, the SSF is a single-stage trigger with a smooth, continuous trigger pull and abrupt hammer release. The SSF is safety certified by Crane Naval Surface War Mfg: Geissele Automatics