Pen spring double action OTF knife

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This is a custom OTF knife crafted solely with a pen spring. The DA OTF - Double Action Out The Front design enables the blade to be opened and retracted with a single switch. It's an automatic knife form that's prohibited for civilians to carry, so please be aware of this warning: Do not carry this knife around if you've created it. I strongly advise against modifying the blade; its round design prevents harm to others. Printing Tips & Instructions: 1. This OTF knife is printed in ABS plastic, and I'm unsure how it will perform with other materials. 2. Use a brim around parts to prevent warping during printing. 3. Support structures are not required for this model. 4. After printing, sand the interlocking parts, especially the blade, so they can move freely. Leave your questions in the comments if you need further clarification. Happy Printing!