Aftermarket Triggers and the Law: What You Can Install and What Ships Where

A trigger group is a part. It ships to your door in every state, it needs no paperwork, and installing one in a rifle you own is as lawful as changing the grip. That is the whole legal story for the great majority of drop-in triggers, and this page could stop there. It does not, because the questions we get about triggers and the law are real ones: whether a light trigger is legal, whether pull weight matters in court, what separates a lawful trigger from an unlawful part, what the states add, and how the rifles in the catalogue reach a dealer. This page answers them plainly.

What federal law regulates

Federal law regulates the frame or receiver of a firearm, which for an AR-15 is the lower receiver, and it separately prohibits any part designed to make a semi-automatic firearm fire more than one round per function of the trigger. A drop-in trigger group that fires one round each time the trigger is pressed and released is neither; it is an ordinary part like a barrel or a stock. Every trigger in our catalogue is a single-shot-per-pull semi-automatic fire control group from a recognised maker. We do not sell, list or source any part intended to convert a rifle to automatic fire, and nothing on this site will.

Pull weight is not regulated

No federal law and no state law sets a minimum trigger pull weight for a civilian rifle. A two-and-a-half-pound match trigger is as lawful as an eight-pound issue trigger. The idea that a light trigger is illegal comes from police department policies, which often set a minimum for duty pistols, and from civil litigation, where a plaintiff's lawyer may argue that a light trigger made an accidental discharge more likely. Neither is law. For a rifle that may be used defensively, a trigger in the four-to-five-pound range with a clean break is the sensible choice for reasons of safety under stress rather than legality; the pull weight guide covers the trade-offs.

Triggers that are not ordinary parts

Federal classification of some trigger designs has moved in recent years and is the subject of litigation and settlements. Our position is simple: we stock conventional semi-automatic triggers, single-stage and two-stage, drop-in and pin-in, and nothing else. If a design's status is contested we do not carry it. That keeps every trigger on this site inside the same legal framework in every state.

What the states add

Most states say nothing about triggers. A few of the states with feature-based restrictions on semi-automatic rifles list certain fire-control features or add-on devices in their definitions, and a handful of states have their own bans on specific trigger designs that are not ordinary drop-ins. None of the states we ship to most restricts a conventional single-shot-per-pull drop-in trigger. The checkout holds every order to what may lawfully be delivered to the address you give, so if a state ever restricts an ordinary trigger the item will be removed before payment rather than shipped and seized.

Selling or shipping a rifle with an aftermarket trigger

A rifle with an aftermarket trigger sells, ships and transfers exactly as any rifle does. If you sell it privately where your state allows private sales, the trigger is not mentioned anywhere; if you sell it through a dealer, the dealer records the rifle by serial number and the trigger is irrelevant. When you ship a rifle to a gunsmith or back to the maker for warranty, the trigger goes with it as a part. The one practical caution is the reverse: a rifle that has been modified so that it no longer fires one round per press is not a rifle with an aftermarket trigger, it is a broken or unlawful firearm, and the troubleshooting guide explains why it must be fixed before it is fired again.

Installing a trigger

Installing a drop-in trigger in a lower you own requires no licence and creates no record; it is a parts swap. Installing it for someone else as a business is gunsmithing and may require a licence if you take possession of the firearm overnight. Selling a rifle with an aftermarket trigger is no different from selling any rifle. The installation guide covers the ten-minute job.

Rifles and lowers in the catalogue

The complete rifles and lower receivers we sell alongside the triggers are firearms and ship to the licensed dealer you name at checkout. You complete ATF Form 4473 there and pass a background check; a rifle may go to a buyer of 18 or older where the state allows and a stripped lower to a buyer of 21 or older. States add permits, waiting periods and feature rules on top; Florida adds a waiting period, Pennsylvania runs its own check, and several states outside our footprint restrict AR-pattern rifles by feature. The city pages summarise each state.

What ships to your door

Drop-in and pin-in trigger groups, hammers, disconnectors, springs and pins.
Anti-walk pin sets, trigger guards, safety selectors and grips.
Complete uppers, barrels, bolt carriers and charging handles.
Magazines, where your state does not cap capacity below the magazine's.

Liability, plainly

A light trigger does not make a discharge accidental; a finger on the trigger does. Keep the finger off the trigger until the sights are on the target, keep the rifle on safe until then, and a two-pound match trigger is as safe as any other. If a rifle may be used under stress, choose the weight for your hands under stress, not for the range.

The pull weight guide, the single-stage against two-stage guide and the troubleshooting guide cover the rest. Browse triggers and rifles in the catalogue.

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