1/2-28 thread
thingiverse
This is the thread designed to fit snugly into the muzzle of AR-15s, 10/22 rifles, Ruger .22 pistols and other similar firearms.\r\n\r\nA customized version of a popular design found at http://www.thingiverse.com/thing:193647\r\n\r\nCrafted using Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=193647
Download Model from thingiverse
With this file you will be able to print 1/2-28 thread 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 1/2-28 thread.