Designing & Testing 3D Printed Firearm Accessories
In this video, I walk you through my latest 3D printed firearm accessory designs created in Shapr3D — including a custom M-LOK hand stop / barricade stop and a dual optic mount for AR platforms with Picatinny rails. I’ll show you the full digital renderings, explain my design process, and share 3D printed prototypes that I’ve been testing for durability and function.
The M-LOK hand stop is designed for stability, recoil control, and barricade support. I cover how the grooves allow for better grip on doors, barricades, and obstacles, while remaining comfortable and snag-free.
Next, I dive into the dual optic/laser mount concept — a lightweight, aluminum-ready design that allows for red dot sights, lasers, or lights, while reducing unnecessary weight. I discuss the challenges of co-witnessing, clamp strength, and machining considerations.
I also share one of my first aluminum prototypes machined through Xometry, lessons learned from multiple 3D print iterations, and future plans for refining and possibly injection molding these parts.
If you’re into DIY firearm accessories, 3D printing, prototyping AR parts, or custom CNC machining, you’ll find this build breakdown especially useful.
💬 Drop your feedback and suggestions in the comments — I’d love to hear your ideas for improving these designs!
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Timestamps:
0:00 – Intro
0:34 – M-LOK Hand Stop / Barricade Stop design
2:10 – Functionality and testing
2:12 – Dual Optic Mount concept & features
6:00 – 3D printed prototypes overview
8:14 – Machined aluminum prototype
10:57 – Future plans & viewer feedback
Keywords:
3D printed firearm accessories, AR hand stop, M-LOK barricade stop, dual optic mount, Picatinny rail mount, AR15 accessories, custom firearm parts, 3D printing gun parts, CNC machining prototypes, Shapr3D firearm design, aluminum optic mount
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