Franklin Armory BFSIII HK-C1 Binary Trigger HK 91/93/MP5

The Franklin Armory BFSIII HK-C1 is a binary trigger for HK 91, HK 93 and MP5 pattern firearms, including most variants and clones. It has a curved trigger and an ambidextrous safety selector that fits most two and three position trigger housings, and it works in SP5K housings.

Position 1 is safe, position 2 fires one round per pull, and position 3 (binary) fires one round on the pull and one on the release. Moving the selector out of binary while holding the trigger back cancels the release round. The trigger housing ejector, ejector pin and ejector spring are not included, and some guns may need additional fitting. Binary triggers are not legal for civilian sale in every state, so check your state and local law first.