Franklin Armory's patented Binary Firing System (BFS) is now available for your Glock 17 Gen3! The new G-S173 allows you to select between semiautomatic and Binary modes to provide reduced split times and tighter groupings. Like all BFS triggers, the release round can be cancelled by simply switching back to semiautomatic while the trigger is depressed. Plus, youll always know which mode youre in without having to come off your target with the integrated back plate mode indicator. Perfect for defense, sporting and recreational use. Specifications for Franklin Armory G-S173 Pistol Trigger: Manufacturer: Franklin Armory Gun Model: Glock 17 Gun Make: Glock Trigger Shape: Straight Model Generation: 3 Cartridge: 9mm Luger Features of Franklin Armory G-S173 Pistol Trigger Easy to install Selectable Semi and Binary (pull and release) Integrated mode indicator Optics ready (custom adapter plates sold separately) Front and rear tritium night sights High-tactile front and rear serrations Anti-glare top stripe serrations Package Contents: Franklin Armory G-S173 Pistol Trigger