: Unlike traditional auto sears that require drilling a third hole in the rifle's receiver, a DIAS is designed to simply "drop" into the lower receiver without permanent modifications to the firearm itself. The Keychain Strategy: "Novelties" with a Secret
| 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 | Drop In Auto Sear Keychain