It is usually unproductive or misleading to try to define a gun's quality by the maker's name. As noted, most makers supply a range of original quality grades. Therefore, it is necessary to include the gun's model along with the make. The price of the gun will give you a strong clue as to quality. There are no elves stashed away in cottages in the forest who turn out only best quality guns for farmer grade prices. A sound, shootable gun can be made for a few hundred dollars. A decently finished gun can be made for a few thousand. The last few % points in quality cost a lot of money.