Binary Triggers Explained: How They Work, Why Shooters Use Them, and What to Know Before Buying

Quick Answer

A binary trigger is a specialized trigger system that can fire one round when the trigger is pulled and another when the trigger is released.

In Franklin Armory's Binary Firing System, the shooter can select between safe, conventional semiautomatic operation, and Binary mode. In Binary mode, the pull and release are treated as separate trigger functions, with one shot associated with each.

That operating principle is what makes binary triggers fundamentally different from ordinary semiautomatic triggers, but it is also the source of much of the confusion surrounding them.

A binary trigger is not simply a lighter competition trigger, and it does not operate exactly like a conventional trigger that has been tuned for a short reset.

The shooter has to account for the fact that releasing the trigger can produce another shot while the system is in Binary mode.

That makes training, muzzle discipline, familiarity with the selector system, firearm compatibility, and legal research particularly important.

Franklin Armory's own documentation warns users that misunderstanding the system can result in an unintended discharge and recommends qualified instruction for new users.

Binary triggers have also developed into a much broader category than many shooters realize.

Franklin Armory introduced its first-generation AR Binary trigger in 2015, but its 2026 catalog now describes Binary systems developed for more than 10 popular firearm platforms, spanning rifles, pistol-caliber carbines, rimfire firearms, and striker-fired handguns.

For a prospective buyer, however, understanding the mechanism should come before deciding whether the additional capability is worthwhile.

Key Takeaways

• A binary trigger can fire one round on the trigger pull and another on the trigger release when its Binary mode is selected. Conventional semiautomatic mode remains available on selectable Franklin Armory rifle and PCC systems.
• Binary operation changes how the shooter must manage the trigger because releasing it can be a firing action rather than simply preparation for the next conventional trigger press.
• Binary triggers are available for far more than AR-15s, with current systems covering multiple rifles, PCCs, rimfire platforms, and certain striker-fired handguns.
• Legal status requires careful research. State and local restrictions vary, and Franklin Armory's 2026 catalog identifies numerous jurisdictions where its Binary products are not offered for civilian sale.
• Buyers should consider training, platform compatibility, ammunition consumption, magazine availability, manufacturer instructions, and actual intended use rather than purchasing solely for faster potential firing.

What Is a Binary Trigger?

The easiest way to understand a binary trigger is to begin with the trigger most firearm owners already know.

With a conventional semiautomatic firearm, the shooter presses the trigger and, assuming the firearm is loaded and functioning normally, one round is fired.

The firearm cycles, but the trigger must reset before another conventional trigger press can initiate another shot.

A binary trigger introduces another firing function.

Franklin Armory's current rifle and pistol-caliber-carbine Binary systems use three selectable positions.

Safe prevents firing.

Semi operates conventionally, producing one shot from a trigger pull.

Binary mode permits one shot on the pull and one on the subsequent release.

That final point deserves emphasis because it explains both the attraction and the additional responsibility associated with the system.

The second shot is not produced simply because the firearm cycles.

It is associated with the shooter's release of the trigger.

The trigger finger is therefore performing two deliberate functions that can produce shots instead of one.

For someone accustomed to decades of conventional semiautomatic trigger manipulation, that represents a meaningful change in operation.

Binary vs. Conventional Semiautomatic Triggers

A comparison helps separate several trigger categories that are sometimes discussed as though they accomplish the same thing.

A performance trigger can provide a lighter pull, cleaner break, shorter reset, or different trigger geometry without changing the basic firing sequence.

The shooter still presses the trigger to fire and releases it to allow the trigger to reset.

A binary system changes that relationship because release can become a firing action.

That is why comparing a binary trigger exclusively with a high-end match trigger misses much of the point.

A premium conventional trigger is primarily intended to improve the quality and consistency of the normal semiautomatic trigger cycle.

A binary system changes what the trigger can do.

Some buyers may value both characteristics, but they are not interchangeable concepts.

What Happens When You Don't Want the Release Shot?

This is one of the first practical questions a new binary-trigger user should understand.

If the shooter has already fired the pull shot in Binary mode but then decides not to fire the release shot, simply forgetting about the release function would create an obvious safety problem.

Franklin Armory addresses this through its selector system.

On its rifle and PCC Binary systems, the company states that the release shot can be canceled by keeping the trigger held to the rear and moving the selector out of Binary mode before releasing the trigger.

This functionality is important because circumstances can change between the pull and release.

A target can move.

The shooter's sight picture can change.

Something can enter the shooting area.

The shooter may simply decide that another shot is unnecessary.

The ability to cancel the release shot provides a way to stop the Binary firing sequence rather than treating the second shot as unavoidable.

It also demonstrates why familiarity with the specific trigger system is essential.

The shooter needs to understand the controls and manufacturer-prescribed operation before live fire, not attempt to learn the behavior after the firearm is already loaded.

Franklin Armory's operating documentation places unusually strong emphasis on this point, warning that users should understand the system before operating it and recommending qualified instruction for new users.

The Legal Question Requires More Than a Yes-or-No Answer

Search for binary triggers online and one of the most common questions is simply, “Are binary triggers legal?”

That question needs a more careful answer.

As of Franklin Armory's 2026 catalog, the company identifies the following jurisdictions as not eligible for civilian sale of its Binary products: California, Connecticut, the District of Columbia, Delaware, Florida, Hawaii, Illinois, Massachusetts, Maryland, Minnesota, New Jersey, New York, Oregon, Rhode Island, and Washington.

That manufacturer list is useful for understanding how significant state-level restrictions have become, but it should not be treated as a substitute for legal research.

Laws can change.

Definitions can differ between states.

Local restrictions may also apply, and the legal treatment of a particular trigger or firearm configuration can depend on language more specific than the broad term “binary trigger.”

For that reason, a prospective buyer should verify current federal, state, and local requirements applicable to the exact product and firearm before purchasing, installing, transporting, or using it.

That isn't merely a legal disclaimer attached to the end of the discussion.

With binary triggers, jurisdiction is part of the buying decision itself.

Why Rimfire Has Become an Interesting Binary Platform

The Ruger 10/22 ecosystem illustrates how far the concept has moved beyond its centerfire AR origins.

Franklin Armory's 22-EZ packages its Binary system into a complete drop-in trigger housing for compatible Ruger 10/22 applications.

The company has also developed complete F22 firearms around the same general concept, including .22 LR pistols and rifles.

That family expanded again in January 2026 when Franklin Armory partnered with Angstadt Arms to introduce the F22-V series of integrally suppressed .22 LR pistols, rifles, and SBRs, with both Binary-equipped and conventional semiautomatic configurations offered.

Rimfire changes the economics of the experience.

A binary trigger can increase ammunition consumption considerably simply because the shooter has the ability to produce two shots during a complete pull-and-release sequence.

With centerfire rifle ammunition, that increased consumption can become expensive quickly.

The low recoil and typically lower per-round cost of .22 LR compared with centerfire rifle ammunition make rimfire a logical recreational application for shooters interested in binary operation.

That does not remove the need for training or careful trigger management.

The firing behavior remains different from that of a conventional semiautomatic trigger.

It does, however, demonstrate that binary triggers are not solely about centerfire rifles or tactical-style applications.

Recreational shooting has become an important part of the category as well.

Binary Triggers Have Even Reached Striker-Fired Pistols

Perhaps the clearest indication of the category's expansion is the arrival of Binary systems for striker-fired handguns.

Franklin Armory's G-Series products adapt Binary operation to certain Glock-pattern applications through a more involved system than the traditional AR trigger replacement.

For example, Franklin Armory introduced the G-S193 for the Glock 19 Gen 3 in October 2024 as a trigger-and-slide kit, with its Binary/Semiautomatic selector located on the slide.

The company states that the release shot can be canceled by moving that selector back to semiautomatic operation before the trigger is released.

The important takeaway is not that handgun Binary systems operate identically to their AR counterparts.

They do not necessarily share the same control arrangement or component architecture.

Instead, it shows that “binary trigger” now describes an operating concept that can be engineered into substantially different firearm platforms.

That makes compatibility increasingly important for buyers.

It is no longer enough to decide that you want a binary trigger and then purchase whichever model is available.

The trigger system has to be designed for the specific firearm platform, and manufacturer instructions, compatibility requirements, and operating procedures matter.

Why Binary Triggers Are Different From Other Performance Triggers

One of the easiest mistakes to make when discussing binary triggers is grouping them together with every other trigger designed to make a firearm easier or faster to shoot.

A lighter competition trigger, a short-reset trigger, a forced-reset trigger, and a binary trigger can all change the shooting experience, but they do not accomplish that change in the same way.

A conventional performance trigger remains fundamentally conventional in its firing sequence.

The shooter presses the trigger, one cartridge is fired, the trigger resets, and another deliberate trigger press is required to fire again.

Manufacturers can reduce pull weight, shorten travel, sharpen the break, or reduce reset distance without changing that basic relationship between the shooter's trigger input and the firing cycle.

A binary trigger changes that relationship.

In its Binary mode, one shot is fired when the trigger is pressed and another can be fired when the trigger is released.

Franklin Armory's current Binary Firing System products generally provide selectable safe, conventional semiautomatic, and Binary modes.

That distinction is the foundation for understanding the entire category.

Binary Does Not Mean Fully Automatic

The similarity in perceived firing speed is one reason binary triggers are frequently confused with automatic firearms.

Mechanically and legally, however, firing quickly and firing automatically are not synonymous.

The federal definition of a machinegun focuses on whether more than one shot is fired automatically, without manual reloading, through a single function of the trigger.

In the Department of Justice's 2018 bump-stock rulemaking, DOJ specifically addressed binary triggers and stated that a shot on the pull and another on the release result from separate functions of the trigger.

The Supreme Court later rejected DOJ's treatment of bump stocks in Garland v. Cargill in 2024.

That later decision concerned bump stocks, not binary triggers specifically, but it is important context when relying on the 2018 rulemaking today.

The pull-and-release distinction remains useful for understanding how a binary system operates, but it should not be converted into the overly broad statement that “binary triggers are legal everywhere.”

They aren't.

State and local restrictions can be considerably different from federal classifications, and laws concerning trigger devices can change.

Anyone considering one should verify the current law where the firearm will be possessed and used rather than relying on a retailer description, old forum discussion, or the fact that the product can be purchased somewhere else.

There is another distinction worth making here.

Forced-reset triggers have been the subject of separate federal litigation and regulatory developments.

ATF's current information concerning FRTs discusses the 2024 federal court decision involving Rare Breed FRT-15 and Wide-Open Trigger products and separately warns that some states prohibit forced-reset triggers or trigger-activating devices.

A forced-reset trigger should therefore not be treated as another name for a binary trigger.

The important point is not which system can produce the fastest string of fire.

It is understanding that these mechanisms achieve their results differently and can therefore be treated differently by manufacturers, shooters, and the law.

The Release Shot Changes Trigger Management

The second shot is what makes a binary trigger interesting, but it is also what requires the greatest adjustment from someone accustomed to a conventional semiautomatic trigger.

With a traditional trigger, releasing the trigger is normally part of preparing for the next shot.

The firearm has already discharged when the trigger was pressed, and the shooter allows the trigger to move forward until the mechanism resets.

In Binary mode, that familiar release movement can have an additional consequence: another cartridge can be fired.

That means trigger release can no longer be treated casually.

The shooter has to understand the selected firing mode and maintain appropriate firearm control through the complete trigger cycle.

This is one reason a binary trigger should be approached as a different operating system rather than simply a faster conventional trigger.

Franklin Armory addresses this with a release-round cancellation feature in its Binary Firing System.

On its selectable systems, the shooter can move the selector out of Binary mode before releasing the trigger to cancel the release shot.

Franklin incorporates this concept across several current BFS products, including its AR, Stribog, SCAR, 10/22, and Glock-oriented systems.

From an educational standpoint, that feature matters because it illustrates something fundamental about binary operation:

Once the trigger has been pressed in Binary mode, the shooter needs to remain aware of what will happen when it moves forward again.

This is not the kind of equipment that should be handed to someone without explaining how its controls and firing sequence differ from the conventional trigger they may already understand.

Why Shooters Buy Binary Triggers

Binary triggers occupy an unusual place in the accessory market because most buyers are not purchasing them to solve the same problem that would lead someone to buy a conventional match trigger.

A precision shooter may buy a trigger to obtain a cleaner break and more predictable pull.

A competition shooter may prioritize short reset and consistent trigger weight.

Someone building a general-purpose rifle may simply want a better-quality conventional trigger than the basic unit supplied with the firearm.

Binary systems offer a different experience.

For many recreational shooters, the appeal is simply the ability to produce faster strings of semiautomatic fire using the pull-and-release firing sequence.

That can make a rimfire rifle, PCC, or AR-pattern firearm substantially different to shoot without changing it into a firearm that continuously fires from one trigger function.

That recreational aspect shouldn't be dismissed.

Not every firearm accessory has to produce a measurable improvement in accuracy, hunting capability, or defensive utility to have a legitimate market.

Some products exist because owners enjoy using them.

The important buyer question is whether that experience justifies the cost, ammunition consumption, training requirements, and legal considerations that come with it.

Binary Triggers Have Moved Beyond the AR-15

The AR platform remains one of the most recognizable applications for binary triggers, but the category has expanded substantially.

Franklin Armory says it introduced its first-generation Binary trigger for the AR platform in 2015.

Franklin Armory introduced the AR-ELITE in 2024 as the replacement for its earlier AR-C1 and AR-S1 models, retaining a $429.99 launch MSRP while adding interchangeable straight and curved trigger bows and additional tuning springs.

The AR-ELITE includes interchangeable straight and curved trigger bows along with multiple springs intended to accommodate different AR configurations and calibers.

Franklin Armory's current offerings demonstrate how broad the concept has become.

Binary systems have been developed for AR-pattern firearms, Ruger 10/22 rifles, Grand Power Stribog SP9 models, FN SCAR rifles, and certain Glock Gen 3 pistols, among other platforms.

That expansion is important because each platform gives the binary concept a somewhat different character.

A .22 LR rifle can offer a relatively economical recreational application.

A PCC combines the system with a pistol-caliber platform.

An AR configuration places it in one of America's largest accessory ecosystems.

A handgun application presents an entirely different packaging challenge because the manufacturer has to integrate the mode-selection and firing system into a much smaller firearm.

Franklin's G-S193 for the Glock 19 Gen 3, for example, is sold as a trigger-and-slide system rather than simply a conventional replacement trigger.

Its slide incorporates the selector and mode indication while also providing tritium sights and provisions for optics adapter plates.

That is a useful reminder that “binary trigger” now describes a category of firing systems rather than one universal component that works identically across every firearm.

Cost Depends Heavily on the Platform

Binary systems also tend to cost considerably more than basic replacement triggers.

Franklin Armory introduced the AR-Essential in January 2025 at a $299.99 MSRP as a lower-cost alternative to the $429.99 AR-ELITE.

The more configurable AR-ELITE launched at $429.99 MSRP and includes interchangeable straight and curved trigger bows along with additional springs intended to accommodate different AR configurations and calibers.

Other platforms can move considerably higher.

Franklin announced the G-S193 Glock 19 Gen 3 trigger-and-slide system at $899.99, reflecting the fact that the package involves substantially more hardware than an AR fire-control component.

That changes the value calculation.

A binary trigger may cost enough that buyers should decide what they actually want from the firearm before purchasing one.

Spending several hundred dollars on a specialized trigger for a rifle that still needs an optic, magazines, sling, or other basic equipment may not make sense for every owner.

For someone who already has a complete recreational firearm and specifically wants the binary experience, the calculation can be entirely different.

Ammunition Cost Is Part of the Purchase Price

The price printed on the trigger box isn't the only cost that matters.

A binary system makes it possible to move through ammunition quickly because each complete press-and-release cycle can result in two shots.

That does not mean the firearm must always be fired rapidly, but recreational use can naturally increase ammunition consumption compared with slower conventional shooting.

This is one reason .22 LR applications make considerable sense within the category.

The lower ammunition cost and mild recoil of rimfire firearms can make extended recreational use more practical.

Franklin's development of multiple 10/22-oriented Binary systems, including the 22-EZ introduced in January 2025 with a $369.99 MSRP, shows that the company sees rimfire as more than a novelty application for the technology.

A buyer evaluating an expensive trigger for a centerfire rifle or PCC should therefore consider recurring ammunition cost alongside the initial hardware cost.

The more frequently the firearm will actually be used in Binary mode, the more relevant that expense becomes.

Reliability Depends on the Complete Firearm

A binary trigger should not be evaluated in isolation from the firearm receiving it.

Semiautomatic firearms depend on multiple systems operating together: ammunition, magazines, bolt or slide movement, recoil or buffer components, springs, fire-control components, and the firearm's overall condition all affect function.

This becomes particularly important when a replacement fire-control system is designed for use across different configurations.

Franklin's AR-ELITE illustrates the issue well.

The system includes multiple hammer, trigger, and buffer springs specifically to allow the trigger to be configured for different AR platforms and calibers.

For buyers, the practical lesson is simple:

Compatibility should be researched at the level of the exact firearm, not merely the broad platform name.

“Fits an AR” is not as useful as confirming compatibility with the particular firearm and configuration involved.

The manufacturer's current instructions should be the controlling reference for compatibility, inspection, installation requirements, and operation.

What Should You Know Before Buying a Binary Trigger?

A binary trigger makes the most sense when the buyer understands exactly what it changes.

The federal analysis discussed earlier has treated the pull and release as separate trigger functions rather than multiple shots resulting automatically from one trigger function.

That does not automatically make someone more accurate.

It does not replace good firearm control.

And it does not eliminate the need to understand the firearm's normal operating system.

What it does is add a selectable firing behavior in which trigger release can produce another shot.

That can be entertaining and can substantially change the character of a recreational firearm, but it also introduces a firing sequence that demands deliberate familiarity.

Before buying, the most useful questions are therefore not simply “How fast is it?” or “Will it fit?”

A prospective owner should know whether the exact product is lawful where it will be possessed and used, whether the manufacturer supports the exact firearm configuration, what additional components are required, whether magazines and ammunition are appropriate for the intended use, and whether the owner is willing to spend the time necessary to become familiar with a different trigger behavior.

Those questions turn the binary-trigger discussion away from novelty and toward informed ownership.

And that is ultimately the best way to understand the category:

A binary trigger is not simply a shortcut to faster shooting. It is a specialized fire-control system with its own operating characteristics, costs, compatibility requirements, and legal considerations.

Final Thoughts

Binary triggers make more sense when they are understood as a specialized fire-control system rather than simply an accessory for increasing firing speed.

Their defining characteristic is straightforward: in Binary mode, the trigger can fire one round when pressed and another when released.

That changes something shooters normally take for granted, the release portion of the trigger cycle.

Understanding that difference is essential to understanding how these systems should be approached, regardless of whether they are installed in an AR-pattern firearm, rimfire rifle, PCC, or another compatible platform.

The category has also matured considerably.

Binary systems are no longer limited to one AR trigger design, and manufacturers such as Franklin Armory have expanded the concept across multiple firearm platforms while developing different products for different applications and price points.

That broader availability does not make a binary trigger necessary equipment.

For many shooters, a quality conventional trigger will be more appropriate, particularly when precision, simplicity, or conventional trigger behavior is the priority.

Binary systems make their strongest case as specialized recreational equipment for owners who specifically want the additional firing mode and understand the different trigger management it requires.

Prospective buyers also need to consider more than the purchase price.

Firearm compatibility, ammunition consumption, manufacturer support, installation requirements, and especially current laws can all influence whether a particular binary system makes sense.

Ultimately, the most important thing a buyer can bring to the decision is an accurate understanding of what the trigger does.

Binary triggers are neither conventional performance triggers nor simply another name for automatic or forced-reset systems.

They occupy their own category, with distinct mechanical behavior and ownership considerations that should be understood before purchasing one.

Frequently Asked Questions

What is a binary trigger?

A binary trigger is a fire-control system that can provide a selectable mode in which one round fires when the trigger is pressed and another fires when the trigger is released.

Designs vary by manufacturer and firearm platform, so buyers should consult the instructions for the exact product they are considering.

Is a binary trigger the same as a fully automatic trigger?

No.

Binary operation and fully automatic fire describe different firing mechanisms.

Federal definitions focus on how many shots are fired automatically through a single function of the trigger.

Federal rulemaking has previously described the press and release of a binary trigger as separate trigger functions.

State and local laws can impose additional restrictions regardless of federal classification.

Are binary triggers legal everywhere in the United States?

No.

Laws governing binary triggers and other trigger devices vary by jurisdiction and can change.

Franklin Armory's 2026 catalog lists California, Connecticut, the District of Columbia, Delaware, Florida, Hawaii, Illinois, Massachusetts, Maryland, Minnesota, New Jersey, New York, Oregon, Rhode Island, and Washington as jurisdictions where its Binary products are not offered for civilian sale.

That manufacturer sales list is not a substitute for legal advice or independent verification of current federal, state, and local law.

Are binary triggers only available for AR-15s?

No.

Although AR-pattern firearms are among the best-known applications, binary systems have been developed for several other platforms, including certain rimfire rifles, PCCs, rifles, and handguns.

Compatibility is product-specific and should always be confirmed with the manufacturer.

Is a binary trigger better than a conventional performance trigger?

They serve different purposes.

A conventional performance trigger may focus on pull weight, consistency, travel, break quality, or reset while retaining the traditional one-shot-per-trigger-press firing sequence.

A binary trigger adds a different firing mode in which both the press and release can produce a shot.

The appropriate choice depends on the firearm, intended use, applicable law, and the shooter's preference for conventional or binary operation.

About the Author

The ProArmory editorial team includes experienced hunters, competitive shooters, military veterans, firearms instructors, and firearms industry professionals committed to producing accurate, practical, and research-based content.

Our articles draw on manufacturer specifications, current industry information, and real-world shooting experience to help readers make informed decisions about firearms, ammunition, optics, and related equipment.

Disclaimer

This article is for informational and educational purposes only and is not legal advice. Laws and regulations concerning binary triggers and other firearm components vary by jurisdiction and can change.

Verify current federal, state, and local requirements before purchasing, installing, possessing, transporting, or using any trigger system. Follow the firearm and component manufacturers' current instructions and established firearm-safety practices.