Drop In Auto Sear Keychain Guide

You want a cool, gun-themed keychain that won’t land you in federal court. Here are legal alternatives that scratch the same itch:

To understand the controversy, you first need to understand the mechanics. A standard semi-automatic AR-15 rifle fires one round per trigger pull. The fire control group (FCG) consists of a hammer, trigger, disconnector, and safety selector. Drop In Auto Sear Keychain

The "Auto Sear" is a component found in selective-fire M16 rifles (or legally registered "Machine Guns") that allows for fully automatic fire. When an auto sear is present, it catches and releases the hammer without the trigger needing to be reset, enabling continuous firing as long as the trigger is held down. You want a cool, gun-themed keychain that won’t

A Drop In Auto Sear is a specific, aftermarket design intended to convert a semi-automatic AR-15 into a machine gun with minimal gunsmithing. Unlike older conversion methods requiring drilling or milling, a DIAS is a self-contained unit that "drops in" to the lower receiver, replacing the original trigger group. It works in conjunction with an M16 bolt carrier and a standard selector switch. The fire control group (FCG) consists of a

Key fact: The DIAS itself is considered a machine gun by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) under the National Firearms Act (NFA) of 1934 and the Gun Control Act of 1968. Why? Because the legal definition of a "machine gun" includes not only the complete weapon but also any part designed and intended solely and exclusively for use in converting a weapon into a machine gun.

You might ask: "If it’s so illegal, why do I see these for sale on Etsy, eBay, or Instagram?"

There are three reasons: