What is the Glock Switch Act?

In 2021, the ATF published a final rule, 2021R-08F, redefining "machinegun" to explicitly include auto sears and conversion devices. This is what the industry calls the "Glock Switch Act." It wasn't a new act of Congress, but a regulatory action that made possession of an unregistered Glock switch a federal felony punishable by up to 10 years in prison, regardless of your state's laws. If you own a switch not registered before May 1986, you're in possession of an NFA item.

The Legal Definition of a "Machinegun"

The National Firearms Act of 1934 defines a machinegun as "any weapon which shoots, is designed to shoot, or can be readily restored to shoot, automatically more than one shot, without manual reloading, by a single function of the trigger." For decades, the ATF applied this to complete firearms. The 2021 rule expanded that definition to include "a combination of parts designed and intended for use in converting a weapon into a machinegun," specifically naming "Glock switches," "auto sears," and "conversion devices." This means the part itself, even detached from a firearm, is now legally treated the same as a fully automatic rifle. This reinterpretation is the core of the so-called Glock Switch Act. It's critical to understand that this is federal law, enforced by the ATF and DOJ.

What This Means for Owners and Enthusiasts

If you purchased a Glock switch after May 1986 and did not register it with the ATF during the amnesty period (which has long passed), you are currently in possession of an unregistered NFA Title II weapon. There is no new "amnesty." The only legal avenue now is to transfer an existing, registered switch via a Form 4 from a Special Occupational Taxpayer (SOT) holder, which involves a $200 tax stamp and an extensive background check that can take over a year. For the vast majority of enthusiasts, owning a functional switch is effectively off the table. This is why the market for non-functional display/replica units, like the inert models we carefully vet at Theglockswitchshop, has become the only legal option for collectors.

Understanding the law is paramount. Always verify the compliance status of any device.

State Laws vs. Federal Regulation

Do not confuse state laws with federal regulation. Some states have their own statutes explicitly banning "machinegun conversion devices." However, even if your state is silent on the issue, the federal "Glock Switch Act" rule applies everywhere. You can be prosecuted in federal court even if your local sheriff disagrees with the law. The ATF has made prosecution of switch possession a priority, often working with local agencies that recover them. The legal risk isn't theoretical; cases are being actively pursued. This federal overlay is why sourcing any functional device from an unlicensed individual is an extreme liability.

Navigating the Current Landscape Legally

The only way to legally engage with this niche today is through compliant, non-functional items. These are engineered to be permanently inert, incapable of facilitating automatic fire, and are sold explicitly as display pieces or collector's items. Reputable vendors provide documentation stating the device's non-functional nature. At Theglockswitchshop, we specialize in these legal alternatives, ensuring enthusiasts can own a piece of engineering history without legal peril. It's about appreciating the mechanical design, not circumventing the law. Always perform your due diligence: if a deal seems too good to be true for a "functional" unit, it almost certainly is, and the consequences are severe.

Frequently Asked Questions

Last updated: March 27, 2026