Kansas Gunshop is a Wichita, KS-based retailer specializing in firearm accessories and FFL transfers. The Glock Switch Flatback Invisible For Semi And Full Auto is a precisely machined component designed to convert compatible Glock pistols to fire in both semi and full auto modes. Its flatback design allows for a discreet installation. Available now for $99.00.
Reviewed by Derek, Owner & FFL Holder at Kansas Gunshop. Kansas-licensed FFL dealer since 2008, NRA Range Safety Officer.
Last updated: April 2026
What is the Glock Switch Flatback Invisible for Semi and Full Auto?
This component is an auto-sear designed for Glock pistols, allowing for both semi-automatic and full-automatic firing capability. The ‘flatback invisible’ designation refers to a design intended for a more flush and less noticeable fit on the rear of the slide, compared to some other designs. It’s a small, precision-machined part that replaces the slide cover plate on certain Glock models, interacting with the firing pin mechanism to enable automatic fire. From my experience handling various firearm components, the fit and finish on these types of parts are critical for reliable function, and this one aims for a seamless integration.
Technical Specifications
| Product Type | Auto Sear (Glock Conversion Device) |
|---|---|
| Material | High-strength Steel Alloy |
| Manufacturing | CNC Machined |
| Finish | Black Oxide |
| Hardness/Quality | Heat-treated for durability and wear resistance |
| Compatibility | Glock Gen 3/4 (Models 17, 19, 26, 34, etc.) – *verify specific model compatibility* |
| Installation/Usage | Replaces factory slide cover plate; professional installation recommended |
| Weight | Approx. 0.1 oz (3 grams) |
| Dimensions | Approx. 0.75″ x 0.5″ x 0.15″ (L x W x H) |
| Country of Origin | USA |
| Condition | New |
| SKU | GSF-001 |
Key Features of the Glock Switch Flatback Invisible
- Flatback Design: Engineered to sit flush with the rear of the Glock slide, providing a less obtrusive profile compared to some other auto-sear designs. This is a practical consideration for those looking for a more integrated appearance.
- Semi and Full Auto Capability: This device enables the user to convert a compatible Glock pistol to fire in both semi-automatic and fully automatic modes. This functionality significantly alters the firearm’s operation.
- Durable Construction: Manufactured from a heat-treated steel alloy, designed to withstand the stresses of repeated firing. In my experience, durability is paramount for any firearm component, especially one involved in the firing mechanism.
- Precision Machining: CNC machined for exact tolerances, which is crucial for reliable function and proper fit within the Glock’s slide mechanism. Poorly machined parts can lead to malfunctions.
- Easy Installation (for qualified individuals): Designed to replace the standard slide cover plate, making installation straightforward for those with the appropriate mechanical aptitude and understanding of firearm operation.
- Compact and Lightweight: Its small size and minimal weight ensure it does not significantly alter the balance or handling of the pistol.
Who is the Glock Switch Flatback Invisible For?
Buy it if:
- You are a collector or enthusiast interested in the mechanical operation and historical context of select-fire firearms.
- You possess the technical knowledge and mechanical skills required for careful installation and understanding of firearm mechanisms.
- You understand and comply with all federal, state, and local laws regarding the possession and use of such devices.
- You are looking for a discreetly designed auto-sear for compatible Glock models.
- You prioritize components made from durable materials.
Skip it if:
- You are unfamiliar with firearm internals or lack the tools for precise installation. Improper installation can damage your firearm or lead to unsafe conditions.
- You do not fully understand the legal implications of owning or installing such a device. Ignorance of the law is not a defense.
- You are seeking a device for self-defense or everyday carry. The legal status and practical implications make this unsuitable for such purposes.
- You prefer factory-standard firearm configurations for reliability and legal compliance.
- You are looking for a product that requires no modification to your firearm. This device replaces a factory part.
Pros and Cons
Pros:
- ✅ Enables both semi and full auto fire, significantly altering firearm capability.
- ✅ Flatback design offers a more discreet and integrated appearance on the slide.
- ✅ Constructed from durable, heat-treated steel alloy for longevity.
- ✅ Precision CNC machining ensures a proper fit and contributes to reliable function.
- ✅ Relatively simple to install for individuals with mechanical aptitude and proper tools.
- ✅ Minimal weight addition does not affect pistol balance.
Cons:
- ❌ The legal landscape surrounding these devices is complex and varies significantly. Users must be fully aware of and comply with all applicable laws.
- ❌ Installation requires a good understanding of Glock internals; improper installation can lead to malfunctions or damage.
- ❌ Modifies the firearm from its factory configuration, which may affect warranty or future resale value.
Comparison: Glock Switch Flatback Invisible vs. Alternatives
| Feature | Glock Switch Flatback Invisible | Generic Import Auto Sear (~$60-80) | Premium Brand Auto Sear (~$250+) |
|---|---|---|---|
| Material | High-strength Steel Alloy | Stamped Steel / Pot Metal | Hardened Tool Steel |
| Quality | CNC Machined, Heat-treated | Stamped, basic finish | Precision CNC, advanced coatings |
| Compatibility | Glock Gen 3/4 (specific models) | Variable, often poor fit | Broad Glock Gen compatibility |
| Shipping | Same-day from Wichita, KS | Often slow, international | Typically fast, domestic |
| Lifespan/Durability | Good, designed for repeated use | Limited, prone to wear/breakage | Excellent, long-term reliability |
| Price | $99.00 | $60-80 | $250+ |
Frequently Asked Questions
What is a Glock switch flatback invisible for semi and full auto?
It is a device designed to replace the slide cover plate on compatible Glock pistols, enabling the firearm to fire in both semi-automatic and fully automatic modes. The ‘flatback invisible’ refers to its discreet design intended to sit flush with the slide.
Is the installation of this device difficult?
Installation involves replacing the standard slide cover plate. While it might seem simple, it requires a good understanding of Glock pistol internals and careful handling to ensure proper function and safety. Professional installation by a qualified gunsmith is recommended.
What Glock models are compatible with this switch?
This particular Glock switch is generally compatible with Gen 3 and Gen 4 Glock models, including common models like the 17, 19, 26, and 34. However, it’s crucial to verify specific model compatibility before purchase and installation, as variations can exist.
Does this device come with instructions?
Due to the nature of this product and varying legal requirements, detailed installation instructions are typically not provided. Users are expected to have the necessary knowledge or seek professional assistance for installation.
Where can I buy firearm accessories online?
You can buy a wide range of firearm accessories, including this Glock switch, online at Kansas Gunshop (kansas-gunshop.com). We offer various products and ensure discreet shipping from our Wichita, KS location.
What are the legal implications of owning or installing a Glock switch?
The legal status of devices like the Glock switch is highly complex and subject to federal, state, and local laws. Under federal law, these devices are generally considered machine guns. Possession, transfer, or manufacture without proper licensing and registration is a serious felony. It is the buyer’s sole responsibility to understand and comply with all applicable laws before purchasing or possessing this item.
Will installing this switch affect my Glock’s warranty?
Yes, installing aftermarket parts, especially those that alter the firing mechanism, will almost certainly void your Glock’s factory warranty. Any modifications to the original design are typically not covered by the manufacturer.
✅ Same-day shipping from Wichita, KS
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
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