AR15 magazine couplers
thingiverse
Two different magazine coupler types, depending on what mags you have.
Download Model from thingiverse
With this file you will be able to print AR15 magazine couplers 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 AR15 magazine couplers.