Franklin Armory BFSIII SP-S1 Stribog Binary Trigger

The Franklin Armory BFSIII SP-S1 is the binary trigger upgrade for the Grand Power Stribog. In binary mode the trigger fires one round when pulled and a second round when released; the three-position selector lets the shooter switch between safe, standard semi-auto, and binary on the fly. Moving the selector to safe before releasing the trigger aborts the release shot, which preserves a safe stop in the event of a misidentified target.

Drop-in fitment covers the SP9A1, SP9A3, and SP9A3S Stribog variants. The unit ships with a curved trigger shoe (S-S1 designation; Franklin also makes a flat-faced CZ-style shoe for the Scorpion BFSIII but the Stribog kit is curved-shoe only). Installation reuses the factory pins and takes 20-30 minutes for a competent home gunsmith.

ATF-classified as a semi-automatic trigger. State restrictions apply: California, Washington, Iowa, Hawaii, Maryland, New Jersey, New York, Rhode Island, DC, and Florida either restrict or ban binary triggers. Verify your state's law before purchase. The BFSIII is the most expensive Stribog trigger upgrade in the catalog by a wide margin and is not appropriate for any duty or defensive use case; it is a range and competition tool that doubles practical rate of fire.