Selectable Binary Glock: The G-S173
Two years ago, Nevada-based Franklin Armory broke SHOT Show by appearing at the event with the first commercial selector-switch-equipped slide with a companion two-position binary trigger for a 9mm striker-fired pistol. Set up especially for the Gen 3 Glock 17, it had all the G18-style aesthetic (while being NFA compliant) and a crowd-pleasing ability for binary fire – which allows the user to fire a round both on the pull of the trigger and the release.

The two-position selector. To cancel the release round on G-S173, simply move the selector lever located on the slide from binary to the “semi” position before releasing the trigger.
Rather than just “spray and pray” giggle time kinda fun on the range, such triggers have a very valid application. When used properly and with sufficient training, users will see much-reduced split times and produce tighter groupings, especially when running controlled pairs.
Fast forward to this week and Franklin Armory has released the G-S173 to the public– and I got one.


