Glock Trigger

Glock Binary Trigger: Franklin Armory 2-Shot Trigger Systems for G17, G19, and G23 Platforms

A Glock binary trigger is a semi-automatic trigger system that fires one round on the trigger pull and one round on the trigger reset, producing 2 shots per trigger cycle. The binary trigger for Glock pistols replaces the factory trigger assembly with a modified trigger housing, trigger bar, disconnector, and selector switch. The selector switch allows the shooter to choose between standard semi-automatic mode (1 shot per trigger pull) and binary mode (1 shot on pull + 1 shot on release). Franklin Armory is the primary manufacturer of binary triggers for Glock 17, Glock 19, and Glock 23 platforms. The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) has classified binary triggers as legal semi-automatic components, not machine guns, under federal law as of 2025.

Understanding Binary Trigger Systems for Glock Pistols

A binary Glock trigger system operates through a modified disconnector and sear mechanism that captures the striker during the trigger pull and releases the striker a second time during the trigger reset. The binary trigger Glock mechanism maintains the standard Glock Safe Action trigger safety and firing pin safety plunger. The selector switch on the trigger housing toggles between semi-automatic mode and binary firing mode.

There are 3 operational modes on a Franklin Armory Glock binary trigger: safe (trigger locked), semi (1 shot per pull), and binary (1 shot on pull + 1 shot on reset). The shooter can cancel the second shot by moving the selector from binary to semi before releasing the trigger.

Glock Binary Trigger Compatibility

Glock 17 Binary Trigger Compatibility

The Franklin Armory G-S173 binary trigger fits the Glock 17 Gen 3 full-size frame. The Glock 17 is the most common binary trigger host due to the full-size frame dimensions, 17-round magazine capacity, and the 4.49-inch (114 mm) barrel length that provides a complete powder burn for 9x19mm ammunition. Full-size Glock 17 configurations provide the most stable binary trigger platform due to the longer sight radius (6.49 inches / 165 mm) and heavier slide mass.

Glock 19 Binary Trigger Configurations

The Franklin Armory G-S193 binary trigger fits the Glock 19 Gen 3 compact frame. The Glock 19 binary trigger configuration offers compact sizing with broad aftermarket support and compatibility with a wide range of accessories including optics-ready slides, magazine extensions, and trigger enhancements. The Glock 19 is the most popular compact Glock platform for binary trigger builds.

Binary Trigger Glock 23 Considerations

The Franklin Armory G-S223 binary trigger fits the Glock 23 Gen 3 compact frame in .40 S&W. The binary trigger Glock 23 setup uses the same compact frame dimensions and familiar Glock ergonomics as the G19, with compatibility with many Glock 19 accessories. The .40 S&W caliber produces more felt recoil than 9mm, which requires additional trigger control during binary firing.

Franklin Armory Binary Triggers for Glock

Franklin Armory G-S173

The Franklin Armory G-S173 is a complete binary trigger system for the Glock 17 Gen 3 that includes the trigger shoe, trigger bar, trigger housing, disconnector, selector switch, and all required springs and pins. The G-S173 is a drop-in installation that does not require permanent frame modification. Trigger pull weight in semi mode is approximately 5.5 lb (2.5 kg). Trigger pull weight in binary mode is approximately 4.5 lb (2.0 kg) on the pull stroke and 4.0 lb (1.8 kg) on the reset stroke.

Franklin Armory G-S193

The Franklin Armory G-S193 is a complete binary trigger system for the Glock 19 Gen 3 with the same component list and pull weights as the G-S173, scaled to the compact G19 frame.

Franklin Armory G-S223

The Franklin Armory G-S223 is a complete binary trigger system for the Glock 23 Gen 3 in .40 S&W. The G-S223 uses a heavier return spring calibrated for the .40 S&W recoil impulse.

What to Look for in a Binary Glock Trigger

There are 5 factors to evaluate when selecting a binary Glock trigger:

• Trigger consistency measures how uniform the pull and reset weights are across both strokes
• Reliability under repeated use determines whether the binary mechanism functions through high round counts without failure
• Build quality of the trigger shoe, trigger bar, and selector switch affects longevity
• Installation considerations include whether the trigger is a true drop-in or requires fitting
• Compatibility with the specific Glock generation and frame size prevents fitment issues

Pricing and Value: Is $1,000 Fair for a Glock 17 with a Franklin Armory Binary Trigger?

Yes, $1,000 is a fair price for a Glock 17 Gen 3 with a Franklin Armory binary trigger. The Franklin Armory G-S173 binary trigger retails between $350 and $450. A new Glock 17 Gen 3 retails between $500 and $550. The combined cost of approximately $850 to $1,000 is comparable to other performance-oriented Glock builds that include aftermarket slides, barrels, and trigger upgrades. The binary trigger provides a unique firing capability that no other single component offers.

Related Glock Accessories and Upgrades

Glock binary trigger builds benefit from 4 complementary upgrades:

• Extended slide stop levers for faster slide lock reloads
• Compensators paired with threaded barrels to reduce muzzle rise during rapid binary fire
• Red dot optic mounts on aftermarket slides for target reacquisition between binary shots
• Extended magazines for higher capacity during high-volume binary firing

Glock Binary Trigger Legality and Compliance

The Franklin Armory binary trigger system for Glock provides a legal method to increase firing rate on Gen 3 Glock 17, Glock 19, and Glock 23 platforms. Binary triggers are classified as semi-automatic components under federal law. State restrictions apply in 10+ states including California, Connecticut, Delaware, Hawaii, Iowa, Maryland, New Jersey, New York, Rhode Island, Washington, and the District of Columbia. Verify state and local legality before purchasing. TactaBlue ships binary trigger components with free ground shipping to the contiguous 48 states. Browse aftermarket Glock accessories and night sights at TactaBlue.