Description
The Cobalt Blue “Emerald Green” Tarantula is a high-performance, aftermarket slide assembly designed for Glock 19 Gen 3-5 platforms. It’s for shooters who want a durable, precision-machined upgrade with a unique aesthetic. We’ve carried this since early 2026, and its consistent popularity makes it a regular reorder item for our shop.
Stand-Out Features
- Distinctive Finish: The multi-layer Cobalt Blue cerakote features a striking “Emerald Green” iridescent effect that shifts in the light.
- Precision Machining: CNC-machined from 17-4 stainless steel for a tight, reliable fit on OEM frames.
- Enhanced Sights: Features a deep, wide rear sight channel and a serrated top for reduced glare.
- Optic Ready: The slide is cut for popular micro red dot footprints (RMR/Holosun K pattern).
- Reliability Focused: Internal machining is designed for smooth cycling with a wide range of ammunition.
Technical Data
| Compatibility | Glock 19 Gen 3, 4, 5 |
| Material | 17-4 Stainless Steel |
| Finish | Cobalt Blue Cerakote (Emerald Green Iridescent) |
| Optic Cut | RMR / Holosun K Footprint |
| Weight (measured) | 4.1 oz |
| Front Serrations | Yes, Aggressive |
| Rear Serrations | Yes, Deep & Wide |
| Includes | Slide Only. No internals, barrel, or recoil spring. |
Your Questions Answered
Will this fit my aftermarket Glock frame?
It is machined to OEM Glock 19 specifications. While it may fit many aftermarket frames, we cannot guarantee compatibility. One customer returned it for being “too tight,” which we traced to his specific aftermarket frame. It works perfectly on factory OEM frames.
What parts do I need to complete this slide?
You will need a complete upper parts kit (firing pin, extractor, etc.), a Glock 19 barrel, and a recoil spring assembly. This slide is sold as a standalone component.
Is the optic cut direct-mount or does it need a plate?
The cut is a direct-mount for the Trijicon RMR and Holosun 407C/507C/508T footprint. Most optics in that family will mount directly without an adapter plate.
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