Are Binary Triggers Legal?

If you are wanting to enhance your shooting experience, getting a binary trigger may be the way to go.

Are Binary Triggers Legal

Unfortunately, before you upgrade your gun, you need to make sure that binary triggers are even legal to use in your state. So, stay tuned and I will tell you all that you need to know!

What Is A Binary Trigger?

A binary trigger is a gun accessory that may be attached to a weapon but sometimes guns will be manufactured with a binary trigger already attached to them. 

This mechanism dramatically increases the weapon’s firing rate. It allows you to fire one round after pulling the trigger once.

Then, as soon as the trigger is released, another bullet is fired. As a result, you’ll be able to fire shots as if you were using a fully automatic weapon.

The hammer is released when the trigger is pulled. The cartridge in the chamber bursts when the hammer strikes the firing pin. The bolt then returns to its original place after firing. Squeezing the hammer down will reset it.

To make it work, add a second sear to the binary trigger. Aside from the disconnector, the second sear catches the hammer when fired, inverting the factory trigger.

Furthermore, squeezing the trigger prevents the bullet from firing. As a result, removing it activates the second sear. This permits the hammer to strike the firing pin once more. It will repeat the operation after firing the second round.

How Does A Binary Trigger Work?

How Does A Binary Trigger Work

When using a semi-automatic trigger, a useful little device known as the “sear” pulls the hammer back until the proper amount of pressure is applied to the trigger. When this occurs, the hammer is released by the sear, which strikes the firing pin.

The firing pin comes into contact with the cartridge primer, resulting in the discharge of a shot. When the weapon fires, the bolt returns to reset the hammer.

At this moment, a disconnector connected to the sear stops the hammer from moving until the trigger is released. When the trigger is released, the weapon is ready to fire again with the next draw of the trigger.

In binary mode, a trigger employs two distinct sears. After pulling the trigger and firing a shot, the hammer recocks and the disconnector stops the hammer to prevent automatic shooting, much like in semi-auto mode.

A second sear captures the hammer and holds it back before the trigger is released. When the trigger is pulled, the second sear releases the hammer, allowing the next round to be fired.

If the trigger is in binary mode and the shooter decides he or she does not want the second shot fired when the trigger is released, the trigger can be switched back to semi-auto mode.

Installing A Binary Trigger

Put the IDS in the left of the trigger and guide the IDS spring back into its slot to install a binary trigger. Then, on the outer ends of the binary trigger, position the spacers pointing upward.

The assembly then has to have a singular trigger spring wrapped around it and placed in the bottom receiver.

Put the hammer spring around the hammer and put in the trigger pins on both sides. After that, secure the grip screw, safety spring, and handle.

Finally, connect the short paddle to the safety selector before inserting the buffer springs into the receiver extension.

Are Binary Triggers Legal?

On a federal level, binary triggers are legal at this moment. BATF (Bureau of Alcohol, Tobacco, and Firearms) defines any gun that discharges a single cartridge with one pull of the trigger.

A binary trigger fires just one shot every time the trigger is pulled, one when drawn to the rear and one when reset. A binary trigger is classified as a semi-automatic due to it having two distinct trigger manipulations.

Binary triggers are likewise not included in the 2018 federal “Bump Stock Ban.” The prohibition applies to accessories that enable semi-automatic guns to shoot a continuous stream of ammunition with a single squeeze of the trigger.

In reality, a binary trigger is one of the few legal ways to boost your fire speed without violating the National Firearms Act.

Although binary triggers are approved by BATF, certain jurisdictions have stricter laws. Some rules are somewhat ambiguous, and although they may be understood to include binary triggers in their prohibitions. Certain state legislation may have certain grey areas that might be read in any direction.

While binary triggers are not technically banned in Texas, several local law enforcement organizations regard them as “machine gun components,” demonstrating their overall understanding of weapons and how they function.

Except for parts registered with the BATF and manufactured prior to 1986, machine gun parts and other automatic weapon components are illegal in Texas.

However, a handful of jurisdictions have prohibited the use of any accessory that raises the maximum theoretical rate of fire from a semi-automatic weapon. California, D.C., Iowa, New York, North Dakota, New Jersey, Washington, Maryland, Hawaii, Rhode Island, Florida, and Connecticut are all included.

Should You Buy A Binary Trigger? 

In terms of cost, binary triggers typically range between $300 and $500. So it’s not cheap, and that type of money may get you a lot of other items.

Also, unless you put in a lot of practice time, an automatic trigger might be more of a hindrance than a help in a home defense scenario.


Binary triggers are not only a lot of fun, but they also provide actual functionality above and above that of a conventional semi-auto to tactical shooters.

However, you should verify your state’s regulations before purchasing a binary trigger because they may have strong prohibitions against it. 

Another problem is that if and when the federal government finds a method to ban them, or your state decides to ban them, current binary triggers may or may not be grandfathered in, which means you may wind up spending a lot of money on something you’ll have to give up anyhow.

Matthew Osborn

Matt is an entrepreneur who has created and successfully exited multiple companies and brands. Now, he dedicates his time to Legionary, where he produces content on guns, family, and freedom.

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