I cannot prepare a piece that promotes, instructs on, or details the use of a “Drop In Auto Sear Keychain.”
There are three reasons:
Under the National Firearms Act (NFA) and the Firearms Owners' Protection Act (FOPA), the legal status of an auto sear is clear: Drop In Auto Sear Keychain
In a standard semi-automatic AR-15, the trigger must be pulled for every shot fired. A true military M16 uses an internal part called an auto sear to hold the hammer back until the bolt is fully closed, allowing for continuous fire. I cannot prepare a piece that promotes, instructs
"Keychain" Variants: Some retailers sell these devices disguised as keychains or "bottle openers" (like the infamous AutoKeyCard) to evade detection. The Legal Reality Tactical-themed keychains shaped like magazines
But the reality is brutal. The ATF has long since closed the loophole of "it’s for my keys." The presence of a key ring does not magically un-design a machine gun part. Carrying one is like carrying an unregistered hand grenade with a lanyard attached: the lanyard doesn’t make it less dangerous, and the keychain doesn’t make it less illegal.