This is a Full Auto Glock Switch, a replacement selector component for compatible Glock platforms. It’s for experienced owners who understand the legal requirements for NFA registration and operation. Since we started stocking it in Q1 2025, it’s become one of our most consistent sellers, with repeat customers frequently coming back for it. The demand is real—we had a customer drive three hours to pick one up instead of waiting for shipping.
Stand-Out Features
- Machined from durable steel for reliable function under rapid fire.
- Drop-in installation designed for compatible Glock frames with a modified fire control cavity.
- Provides a consistent, positive selector engagement for mode changes.
- Maintains a low-profile design that integrates with the pistol’s rear housing.
- Precision-milled to OEM-spec dimensions for proper fitment.
Technical Data
| Item Type | Selector Switch / Auto Sear |
| Compatibility | Glock Platforms (Requires Modified FCU) |
| Material | Steel |
| Finish | Black Oxide |
| Weight (measured) | 2.2 oz |
| Installation | Drop-in (to compatible host) |
| Packaging | Plain Bubble Mailer |
Your Questions Answered
Is this legal to own?
This component is regulated under the National Firearms Act (NFA). It is a machinegun part. Possession requires registration with the ATF on a Form 1 or Form 4, depending on configuration. It is the buyer’s responsibility to understand and comply with all federal, state, and local laws. Polymer80Warehouse is a licensed retailer; we do not provide legal advice.
Does this work with a stock Glock?
No. A factory Glock pistol does not have the necessary internal geometry to accept this component. Installation requires a host firearm with a modified fire control unit (FCU) specifically machined to accommodate an auto sear. This is not a simple plug-and-play upgrade for a standard pistol.
What’s required for installation?
Installation requires a compatible host firearm—typically a Glock-style platform with a pre-milled FCU cavity for an auto sear. You will also need the appropriate mounting pins and may require other specific small parts. We recommend consulting with a qualified gunsmith familiar with NFA item assembly and compliance.
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