Drop In Auto Sear Keychain -

The is a non-functional replica of a real DIAS. Typically manufactured from aluminum, steel, or zinc alloy, it is designed to be identical in external dimensions to its regulated counterpart. The critical difference is that the keychain version lacks the hardened steel properties, precise machining tolerances, and internal geometry necessary to function as a fire control component. Many versions are intentionally designed with a hole drilled through the sear surface or are made from soft metals that would deform under the stress of firearm operation.

However, possession of a DIAS keychain plus a compatible semi-automatic rifle (like an AR-15) could be construed as "constructive possession" of an unregistered machine gun. This is a dangerous gray area that has led to arrests and prosecutions. Drop In Auto Sear Keychain

The ATF has repeatedly issued classification letters stating that a drop in auto sear—even one sold as a "keychain," "paperweight," or "display model"—is itself a machinegun if it is shaped and dimensioned to function as a sear. The is a non-functional replica of a real DIAS

| Feature | Safer (Novelty) | Dangerous (Regulated) | |--------|----------------|----------------------| | | Zinc alloy, soft plastic, aluminum | Heat-treated 4140 steel or tool steel | | Critical dimensions | Obviously off (too thick, too short) | Exactly matches MIL-SPEC DIAS | | Modifications | Large non-functional hole, welded seam, filled cavity | Fully solid, no obstructions | | Markings | "INERT," "NON-FUNCTIONAL," "KEYCHAIN" stamped | Unmarked or military markings | | Seller disclaimer | Explicit statement: not for firearm use | Vague language or no disclaimer | Many versions are intentionally designed with a hole