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Regular price $10.99
Regular price Sale price $10.99
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Thumb Crook M-Lok indexer with integrated indexing tab and including m-lok hardware. Featuring a knurled knob texture for a tactile grip. This is purpose designed to enhance a modern c-clamp grip by providing an indexing point for the crook of your hand between your thumb and pointer finger. Designed to be low profile to prevent snagging while providing maximum surface area for your grip. Available in translucent or painted Black and FDE with Rust-Oleum Camouflage.

This is a GOON DYNAMICS original product! Have your own 3D printer? Purchase the .STL files here:

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The Mission

We strive to provide custom design and fabrication at competitive prices.

The Legal

We will not sell 3D printed firearms or anything regulated by U.S. government agencies. You are responsible for understanding and following all local and federal laws. See Terms and Conditions section linked in the footer for more details.

The Resin

Traditional 3D printed resin is fragile and becomes brittle with prolonged UV exposure. Our 3D printed products are made with SirayaTech Build, which is a high-strength engineering resin designed for prototyping structural models. 'Build' offers impressive properties at 50 Mpa tensile strength, 8% elongation at break and a heat deflection rating of 165 degrees Fahrenheit. It will not become brittle with prolonged UV exposure and is also tappable. Our commercial products have all been tested for comptability and durability to ensure that you receive high quality accessories.

Return Policy

We accept returns! If you are not happy with your purchase, we will send replacement parts or provide a full refund. Please contact us with any questions you may have. See Return, Refund and Exchange Policy linked in the footer below for more details.