Mil-spec Buffer Tube Vice Block

thingiverse

This is a 4-inch vice block designed specifically for mil-spec buffer tubes. It won't fit properly on commercial tubes, so be aware of that limitation. I've also created a commercial block that can be found at Thingiverse under the ID #4540391. No supports are necessary when printing this design, and you don't need to worry too much about speeds, feeds, or resolution. What's most important is achieving good adhesion between layers and using a relatively dense infill to prevent breaks while it's in use as a vice.