Drop In Auto Sear Keychain [patched] Jun 2026

The marketing pitch usually goes something like this: "It’s just a paperweight. It’s just a keychain. It doesn’t work. Don’t be a felon."

If a keychain is milled to the exact or near-exact dimensions of a functional conversion kit, requiring only the removal of a small piece of metal or the addition of a pin to function, the ATF routinely classifies the raw keychain itself as an unregistered machine gun. Drop In Auto Sear Keychain

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. The marketing pitch usually goes something like this: