USP Rail Adapter
thingiverse
If you've handled a USP, you know what this is for. This is an adapter that installs a section of picatinny rail under the HK USP proprietary rail. It actually works, but because it's meant to be a snap-on/snap-off design, it isn't rigidly mounted. I would only suggest using this for flashlights. It won't hold zero if you add on a laser. Also, it's designed for a USP 9mm Full Size. If you have the .45 or a Compact, you may need to modify this slightly. Find out more about this design and others on my blog http://www.printedfirearm.com. Built off of Thomas Harold's picatinny template. Original design by Noah.
With this file you will be able to print USP Rail Adapter with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on USP Rail Adapter.