AutoFling Semi-Auto Slingshot: Optimized Gen4

Update — July 12, 2026

1. Model & Hardware Compatibility
   All hardware parts used in this model are now fully compatible with both the 3D-printed and CNC versions.
2. Official Hardware Kit Available
   The complete hardware kit is now available on autofling.com, as many of the required parts are difficult to source individually on Amazon.
3. Version Recommendations

• 3D-Printed Version: Due to the physical limitations of 3D-printed materials, this version is not designed for maximum long-term durability. If a beginner accidentally hits the frame opening with a steel ball, the frame may crack. We recommend using it mainly as an entry-level introduction to the AutoFling system.
• CNC Version: For a more complete, durable, and long-lasting experience, the CNC version is available on our official website.

1. Patent & Usage Notice
   Our U.S. patent has been officially granted, and all rights are reserved. The 3D-printable version is provided strictly for personal, non-commercial use.

AutoFling GEN4 Auto-Loading Slingshot

3D Print Optimized Ball-Lock Edition | Semi-Auto Mechanical Toy

Hey MakerWorld Community! 👋

We are thrilled to bring the officially patented AutoFling experience directly to your 3D printers!

To help you get started, here is everything required to build this semi-auto mechanical toy:

🧰 Hardware BOM & File List

3D-Printed Parts

Please print all provided STL/3MF files using the recommended infill and wall settings for maximum strength.

Required Hardware

🛠️ Why We Redesigned This Specifically for Makers

We are releasing these GEN4 printable files to allow fans in restricted regions to experience our original design. We listened to community feedback and realized that our previous rubber band locking mechanism was simply too complicated for a DIY build. It required extra screws, T-sliders, and springs, which made assembly tedious and sourcing the right hardware a real headache for makers worldwide.

To solve this and make the build as accessible as possible, we completely redesigned the front-end. This optimized GEN4 version drops all that complex hardware entirely! Instead, it utilizes a brilliant, tool-less 6mm Carbon Steel Ball locking mechanism to securely clamp the rubber bands. It’s an elegantly simple, highly effective solution that makes printing, sourcing parts, and assembling this semi-auto slingshot incredibly easy!

📺 Assembly Tutorial & Hardware Kits Coming Soon!

We are currently in the studio recording a dedicated, step-by-step assembly tutorial video specifically for this 3D printed semi-auto slingshot / auto-loading slingshot. At the same time, we are organizing and preparing official assembly hardware kits to make your build even easier!

Make sure to subscribe to our YouTube channel so you don't miss the video drop and the hardware kit release: 

🎥 YouTube: https://www.youtube.com/@autofling.official

🤝 Join the AutoFling Community

Connect with fellow makers, share your builds, ask questions, and chat directly with our dev team! 

💬 Discord: https://discord.gg/kjkRYXvVZ 

💬 WhatsApp: https://chat.whatsapp.com/DtiNUmf7V1K6uqkanL8XqA

🌐 Upgrade to the Ultimate CNC Metal Experience

Before you start printing, please keep in mind that this 3D printed version is strictly for casual experience and understanding the mechanism. 3D printed plastic is inherently fragile and not suitable for long-term or heavy-duty use.

If you are looking for a sturdy, highly stable, and truly durable product, we highly recommend checking out our official CNC 6061 T6 Aluminum version. Our newest generations of these high-end mechanical toys are manufactured exclusively via precision aerospace-grade CNC machining, offering unparalleled strength, reliability, and aesthetics that plastic simply cannot match. For the authentic, high-strength official sporting product with worldwide DDP shipping, please visit our official store: 🛒 Official Website: autofling.com

⚠️ Extremely Critical Safety & Structure Warning

This 3D printed GEN4 auto-loading slingshot is NOT comparable in any way to the durability of our official CNC 6061 T6 Aluminum versions. To avoid breakage or safety issues:

• Low Power Only: Use only low-power, reduced-tension rubber bands. Do NOT use full-strength official bands on a printed plastic frame.
• Proper Technique: Always use the correct operating technique and properly grip the pouch with your rear hand.
• Shatter Risk: If the rubber band slaps the frame during release, the printed body will split or shatter immediately. Always wear eye protection.

⚖️ Global Patent Protection & Strict Non-Commercial License (CC BY-NC 4.0)

This entire project is licensed under CC BY-NC 4.0 International.

• Personal Use Only: NO commercial use of any kind. No selling, printing for sale, mass production, resale, repackaging, or commercial redistribution.
• Global Patents: AutoFling™ high-end mechanical toys and auto-loading slingshot mechanisms are fully patented in China and the United States.
• Zero Tolerance for Counterfeits: We will pursue full legal litigation against any commercial infringement, without exception, on all platforms including: Shopee, TikTok Shop, Amazon, Shopify, and all independent websites. Low-quality counterfeits severely damage the international reputation of original creators and Made-in-China innovation. We strongly demand all copycats stop misusing our design for profit.