Why drop in autosears sold for $40k–$52k — the tiny device worth more than many guns

Published on March 7, 2026
Duration: 0:48

This entry details the function and legal classification of a Drop-In Auto Sear (DIAS), a device that converts an AR-15 receiver to full-automatic fire. It highlights the extreme rarity and value of registered, transferable DIAS units, with only two known to exist in the US before 1986, commanding prices of $40,000-$52,000. Unlike registered receiver guns, a DIAS is considered a self-contained legal machine gun.

Quick Summary

A Drop-In Auto Sear (DIAS) is a small metal part that converts an AR-15 receiver to full-automatic fire. Only two registered, transferable DIAS units were made in the US before 1986, making them exceptionally rare and valuable, selling for $40,000-$52,000. Legally, a DIAS is considered a self-contained machine gun.

Chapters

  1. 00:00What is a Drop-In Auto Sear?
  2. 00:15Rarity and Value of Registered DIAS
  3. 00:36Legal Classification as Machine Gun

Frequently Asked Questions

What is a Drop-In Auto Sear (DIAS)?

A Drop-In Auto Sear (DIAS) is a small metal component that is inserted into an AR-15 receiver. Its primary function is to convert the firearm to full-automatic fire capability. It is designed to be easily installed and removed.

Why are registered Drop-In Auto Sears so expensive?

Registered, transferable DIAS units are extremely rare because only two were legally manufactured in the US before the 1986 machine gun ban. This scarcity, combined with their ability to convert standard AR-15s to full-auto, drives their market value to tens of thousands of dollars.

How is a Drop-In Auto Sear legally classified?

Unlike a standard registered receiver machine gun, a Drop-In Auto Sear is legally classified as a self-contained machine gun. This means it is a regulated NFA item in itself and can be moved between different AR-pattern firearms.

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