A "Drop In Auto Sear" (DIAS) is a small mechanical component designed to convert a semi-automatic AR-15 into a fully automatic machine gun without requiring permanent modifications to the receiver. To evade detection by law enforcement and platform filters on sites like AliExpress or Temu, sellers often market these items as bottle openers wall hangers Legal Status and Consequences Classification:
, a metal card marketed as a "pen holder" or "conversation piece" that had the silhouette of a lightning link (a type of auto sear) laser-etched onto it. 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 to hold the hammer back until the bolt is fully closed, allowing for continuous fire. A "Drop In Auto Sear" (DIAS) is a
Machine shops produce identical 1:1 scale replicas of actual auto sears. They are made of steel or aluminum, feature the correct dimensions, and often include the necessary pin holes. The only difference? A hole drilled for a keychain ring or a laser engraving that says “KEYCHAIN.” A true military M16 uses an internal part