Franklin Armory, a company known for its binary triggers — which allow semi-automatic firearms, including AR-15s and AK-47s, to fire one shot when the trigger is pulled and another shot when the trigger is released — has begun shipping binary trigger conversion kits for Glock pistols. Designed specifically for 9mm Glock 17 Gen3 pistols, the new G-S173 kit includes a replacement slide and trigger, as shown below.
Unlike standard Glock slides, the G-S173 slide features a selector at the rear that allows shooters to toggle between semi-automatic and binary firing modes. With the latter mode enabled, a shooter can effectively double their rate of fire and unload a magazine in seconds, which is why binary triggers are so dangerous.
First introduced in January 2022 at the Shooting, Hunting, Outdoor Trade (SHOT) Show hosted by the National Shooting Sports Foundation, the gun industry’s trade association, Franklin Armory only recently began shipping its Glock binary trigger kits, which may provide an alternative to the third-party devices — known as “Glock switches” — that convert Glock pistols into machine guns.
Franklin Armory notes that the G-S173 kit is not available for sale in several states, including California, Florida, Illinois, and others, that have banned devices designed to increase a weapon’s rate of fire. However, the company has not publicly commented on the G-S173 kit’s legality on the federal level or whether it’s been approved by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF). Further, Franklin Armory has not published ATF approval letters for any of the binary triggers that it produces for AR-15s, AK-47s, and other semi-automatic platforms.