Forced Reset and Binary Triggers: How They Work and Where They Stand

Forced-reset triggers and binary triggers are two of the most misunderstood products in the firearms market. Both increase how fast a semiautomatic rifle can be fired. Neither makes the rifle a machine gun. Both have been through litigation, and the legal picture has changed more than once in the last five years. This guide explains what each one actually does mechanically, where the law currently stands, what a dealer can and cannot ship, and what we will never sell regardless of demand.

How a standard trigger works

On a normal AR-15 trigger, pulling the trigger releases the hammer and fires one round. The bolt carrier cycles, cocks the hammer, and the hammer is caught by the disconnector while your finger is still back. Only when you release the trigger far enough does the disconnector hand the hammer to the sear, ready for the next shot. That reset stroke is dead time. Everything in this category of product is an attempt to shorten it.

What a forced-reset trigger does

A forced-reset trigger, usually shortened to FRT, uses the movement of the bolt carrier to physically push the trigger forward against your finger after each shot. The reset is not waiting on you to release; the rifle does it for you, and your finger simply has to keep pressure on. The result is a much faster rate of aimed fire than most shooters can produce with a standard trigger.

The mechanical point that matters legally is this: one round is fired for each function of the trigger. The trigger still has to travel forward and be pulled again for each shot. That is the same test that separates a semiautomatic firearm from a machine gun under federal law.

What a binary trigger does

A binary trigger, sometimes sold as a release trigger, fires once when you pull and once when you let go. A three-position selector usually gives you safe, standard semiautomatic, and binary mode, so you can switch the feature off. Two rounds, two distinct movements of the trigger, one in each direction. Binary triggers have been sold openly for longer than FRTs and have faced far less federal scrutiny, though a handful of states restrict them by name.

The legal history in short

The ATF took the position for several years that certain forced-reset triggers were machine guns, issued classification letters to that effect, and seized product. That position was challenged in federal court, and in 2024 and 2025 the litigation went against the agency in the cases brought by Rare Breed Triggers and by a coalition of states and individual plaintiffs. A settlement announced in 2025 provided for the return of seized triggers and an end to enforcement against the products covered by it. Related litigation brought by other states has continued in parallel, and appellate activity has not entirely stopped.

What that means for a buyer is simple and unsatisfying: forced-reset triggers are lawfully sold under federal law today, and the federal picture has moved before. Several states restrict or ban them independently of Washington, and a state ban is not affected by a federal settlement. Before you order one, check the current regulations for your own state. If your state page does not say, ask your state police or attorney general's office rather than a forum.

What we will not sell, ever

There is a clean line between the products on this page and machine gun conversion devices, and it is worth stating plainly because the internet blurs it constantly. We do not sell, ship, source, order or advise on auto sears, conversion switches, lightning links, drop-in auto packs or bump stocks. Those devices make a firearm fire more than one round per function of the trigger, they are machine guns under federal law, and possession carries serious federal penalties for an unlicensed person. No court ruling about forced-reset triggers changed any of that. If you came here looking for one of those items, we are not the shop.

Will it work in my rifle

Most forced-reset and binary triggers are built for the AR-15 platform, and many manufacturers also offer AR-10, AK and pistol-calibre variants. Fitment is not universal. Three things decide whether a given unit runs in your rifle.

Buffer and spring weight. These triggers are sensitive to carrier speed. Many makers specify a particular buffer weight and an H or H2 buffer is a common requirement. Running the wrong buffer is the most common cause of a unit that doubles unpredictably or fails to reset.
Gas system. An overgassed rifle or an adjustable gas block set too far open changes carrier timing. A standard mid-length or carbine system with the factory gas block is the easy case.
Lower receiver geometry. Some billet and non-standard lowers have pin spacing or shelf height that interferes with a drop-in cassette. Check the maker's compatibility list before ordering.

Fire control parts are not firearms, so they ship to your door where state law allows it, unlike the rifle itself which goes to your dealer. That is explained in more detail on the state gun laws overview.

Shooting one well

A fast trigger does not make anyone a better shooter, and it exposes weak fundamentals immediately. If you buy one, treat the first few range sessions as a training problem rather than entertainment.

Start on a standard trigger, or in semiautomatic mode on a binary unit, and confirm your rifle runs and your zero is good.
Switch modes only at the firing line with the rifle pointed downrange. On a binary trigger, remember that moving the selector out of binary mode with the trigger held back will still release the second shot on some designs. Read the manual.
Expect ammunition consumption to rise sharply. A thirty-round magazine goes very quickly, and a hot barrel from sustained fire costs accuracy and barrel life.
Many public ranges prohibit rapid fire outright. Check the range rules before you go, and do not assume that a state-run range treats this differently from a club.
Keep a spare buffer, spring and the original trigger group in the range bag so you can return the rifle to a known configuration.

Buying from us

We stock forced-reset and binary units as ordinary catalogue items alongside conventional drop-in triggers. If your state restricts them, we will not ship one to you, and the product page reflects that. If you are building a rifle to run one, the buffer, spring and gas notes in the AR-15 guide are worth reading first, and the complete parts selection is in the shop. State-level detail sits on each city page.

One last point. The legal status of these products has been litigated repeatedly and the rules are not settled everywhere. Nothing here is legal advice, and a summary written today can be out of date next year. Check the current regulations for your state before you order.

General information, not legal advice. Current as of September 2026. Laws change; check the official source before you act.