AR Upper Vice Block
thingiverse
This is an AR15 upper vice block designed specifically for assembly purposes. Do not print this part vertically, as layer adhesion may fail to hold strong. Printing it on its side is untested, but printing it sideways might just work. After successful assembly, use a 1/4 drill bit to ream out the pin holes. A simple metal rod with a diameter of 1/4 will fit snugly through the takedown pin holes, providing a secure fix in place.
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