Drop In | Auto Sear Keychain

Possession can result in up to 10 years in federal prison and fines up to $250,000.

is a small, precision-engineered part that bypasses this cycle. When "dropped" into a compatible semi-automatic receiver (most commonly an AR-15), it trips the sear automatically as the bolt carrier moves forward into battery. This allows the firearm to fire continuously as long as the trigger remains depressed, effectively converting a civilian rifle into a fully automatic machine gun. The "Keychain" Controversy and Legal Reality Drop In Auto Sear Keychain

A "Drop In Auto Sear" (DIAS) keychain is a device often marketed as a novelty item or tool that is shaped like a firearm conversion part. However, beneath the "keychain" branding, these items are frequently classified as illegal machine guns by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF). Possession can result in up to 10 years

Here is where the dream of a tactical keychain dies a violent death. The ATF does not care about the key ring hole. This allows the firearm to fire continuously as

In a standard semi-automatic pistol (like a Glock 17 or AR-15 platform), the trigger mechanism is designed to reset after every shot. You pull the trigger, one round fires, the trigger resets, and you must pull it again to fire another round.