What You’re Actually Buying

Let’s be clear from the start. You’re looking at a Glock auto sear, commonly called a “switch.” This is a small, machined component that replaces the rear slide plate on your Glock pistol. Its sole function is to mechanically alter the firearm’s firing sequence. In a stock Glock, one pull of the trigger fires one round. With this device installed and the trigger held rearward, the firearm will continue to cycle until the magazine is empty. This is a fact, not a sales pitch.

It does not make your Glock more accurate. It does not increase muzzle velocity. It turns your semi-automatic pistol into a machinegun under the National Firearms Act (NFA). That carries significant federal legal weight. We assume you know this and are either an SOT/FFL holder, operating under appropriate law enforcement authority, or are purchasing for export to a jurisdiction where such devices are legally permitted for civilian ownership. We do not sell to private individuals in the USA without proof of compliance. Period.

Mechanics, Not Magic

People throw around slang terms like “Glock switch,” “button,” or “Yankee Boogle.” We call it what it is: an auto sear. Here’s how it works on a mechanical level.

Your Glock’s striker system relies on specific timing and engagement points to reset the trigger after each shot. This sear interrupts that process. When installed, it uses the energy from the slide’s recoil to automatically re-engage the trigger mechanism without the shooter releasing pressure. The result is a continuous cycle of fire. It’s a simple mechanical intervention, but it changes the fundamental classification of the firearm.

Important Note: Glock frames and slides are not engineered for sustained automatic fire. Using this device will dramatically increase wear on components like the striker, ejector, and slide rails. It can lead to malfunctions and significantly reduces shooter control. This is a specialized component for specialized applications, not a range toy.

Installation: A Straightforward Process

If you have a basic understanding of your Glock’s disassembly, installation takes about two minutes. No permanent modification is needed.

1. Clear the firearm. Remove the magazine and visually and physically confirm the chamber is empty.
2. Lock the slide rearward and use a punch or the takedown tool to rotate the slide lock down. Remove the slide from the frame.
3. Use a small punch to push out the rear slide plate’s retaining pin. Carefully remove the factory slide plate.
4. Insert the auto sear into the same channel, ensuring it sits flush and the selector pivots freely.
5. Re-insert the retaining pin to secure the unit. Reassemble the slide onto the frame.

Fitment: Our sears are CNC-machined to OEM Glock specifications. They are designed to fit Gen 3-5 models and most clones that use true Glock-pattern slides. Some aftermarket slides with non-standard rear channel dimensions may require minor fitting. If you’re running a custom slide, be prepared for that possibility.

What We Sell & What We Don’t

We sell a precision-machined auto sear. We provide the technical information required for its installation and operation. We do not sell legal advice. It is your responsibility, as the purchaser, to understand and comply with all local, state, and federal laws regarding the possession and use of this device. In the United States, possession of this item without the proper NFA registration is a felony punishable by up to 10 years in prison and a $250,000 fine.

Our Requirements for U.S. Sales: Valid FFL/SOT documentation must be provided prior to shipment. No exceptions.

Why Buy From GlockSwitchPro.com?

Because this isn’t a hobby for us. We supply professionals. Our auto sears are machined from hardened tool steel, not cast from pot metal. They undergo function testing to ensure reliable operation. When you order, it ships the same day in plain, discreet packaging with no external markings. We don’t use flashy marketing because the product speaks for itself. We offer transparency on function, legality, and limitations—something you won’t find on sketchy forums or Telegram channels.

If you have the credentials and the need, we have the product. It’s that simple.

Frequently Asked Questions