As it happens, KBC has a sale on right now. I have examined - but not run - one of their Grip lathes, and it <looked> better than a BB. BB has a new model 12" lathe at an attractive price out now that they say is suitable for gunsmithing. Although it has a decent spindle bore, it has a rather short c. to c. Unfortunately it does not have a quick change gearbox, and lacks a threading dial, so it would be awkward to use for threadcutting, and could not be recommended for the purpose. At one BB I visited, they had a threaded piece of steel with a lathe, presumably to show what the lathe could do. Don't know if it was the operator, or the lathe, but the quality of the work was enough to make me lose interest in that particular machine very quickly. Something to consider if buying a used machine is that hobby machinists will pay a premium for smaller machines, that are easier to transport and install. This drives prices up a bit. Larger machines may be less expensive in comparison, and everything else being equal, bigger can be better. Just get a professional to move the lathe, to avoid risk of injury or damage. Had to get a 16" SB with 8' bed moved down a flight of stairs once. Even with a professional, it was a bit scary at times.