I have a few .stl files that I would like to get printed to use in AR builds, I can email the files as I am not sure if we can post files on the forum.
A vise block that holds the lower securely in a vise, a hammer block that lets you dry fire against the block without damaging the lower receiver, a block that holds the lower receiver while you drive in (or out) the trigger guard retaining pins, and an upper block that holds the upper securely in a vise that is a safe and correct way to hold it while installing or removing a barrel.
I would be very interested in having these tools made fairly quickly if possible..