Just my opinion based on the pictures, but I have serious doubts it is strong enough and solid enough to fill my requirements for gun work. Looks to be made of cast aluminum, with a steel ball and socket pedestal. But, maybe it is heavier and more massive than it appears to be in the pics. Its advertised that it will handle 100 ft./lbs. of torque. That's not much. Might be fine for checkering but it's not enough for holding a fine action or set of barrels safely, IMO.
I have a small cast aluminum vise with a similar steel ball socket base for swiveling, and it is just not solid enough for most gun work. I have it mounted on a block of a 2 X 6, and when I do use it for tiny things I clamp the block into my big woodworking vise on the front of the workbench. But, when it comes to working on an action or set of barrels the big post vise always get the nod.
