Possession of an unregistered machine gun—which includes an unauthorized post-1986 auto sear or a keychain classified as such—is a federal felony.
If you want to look at how these laws apply to other firearm accessories, I can break down the legal status of or forced reset triggers (FRTs) . AI responses may include mistakes. Learn more Share public link
While some hobbyists have demonstrated that a DIAS can be crudely made from a coat hanger, such items are explicitly considered machine guns by the ATF. Summary of Key Points Registered DIAS 3D-Printed/Keychain "Sear" Legality Legal (if registered & pre-1986) Illegal (NFA violations) Functionality Usually low, but illegal regardless Material Machined Steel Plastic/3D printed/Crude metal Purpose Legal NFA Investment Illegal conversion device Conclusion Drop In Auto Sear Keychain
Federal authorities, specifically the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), have consistently maintained that possession of these items can lead to severe criminal charges. The classification of such a device as a "machine gun" under the National Firearms Act (NFA) means that possession without proper registration and licensing is a federal felony, punishable by significant prison time and substantial fines.
In firearms like the AR-15 platform, a standard rifle fires one round per trigger pull (semi-automatic). A real, functional DIAS is a small metal component designed to sit inside the rifle's receiver. It bypasses the standard semi-automatic disconnector, releasing the hammer automatically after the bolt closes. This allows the firearm to continuous-fire (fully automatic) with a single, sustained pull of the trigger. Learn more Share public link While some hobbyists
| Use Case | Benefit | |----------|---------| | | Demonstrates full-auto trigger assembly without needing a transferable machine gun. | | EDC conversation piece | Unique keychain for gun-savvy friends; sparks legal/ethical discussions. | | Lost key prevention | Bright color options (e.g., neon orange training sear) make keys easy to spot. | | Bottle opener / multitool (optional upgrade) | Add a small flathead edge or bottle opener cutout for utility. |
While marketed by some as a harmless novelty or a conversation piece, this device is recognized by federal authorities as a regulated firearm component In firearms like the AR-15 platform, a standard
A is a small mechanical component designed to convert a semi-automatic AR-15 into a fully automatic firearm. While often marketed as a "keychain" or "paperweight" to bypass legal scrutiny, federal law in the United States classifies these devices as machine guns in their own right.