Not sure if anyone else would find this useful but I figured I'd post it. I recently bought a 6.5x55 barrel for a Savage Axis action that I wanted to change and didn't want to buy a barrel vise. I mocked up this set of blocks that clamps around the Axis receiver and allows you to clamp it in a bench vise to remove or replace the barrel nut. The bottom portion has a key that indexes into the magazine well of the action. I printed at 75% (cubic) infill - the first attempt at 35% infill cracked/crushed in the vise but at 75% it holds up fine.

At first I had considered adding some friction tape to the top block but honestly it worked perfectly without it so I figured without it the plastic would have less chance of marring the receiver finish.

https://drive.google.com/uc?export=d...3sC3SDXp3Gv-qE