I've got an older Oregon large mount stihl bar here I got in a lot of bars. I can put a new 3 river tip on it in either 3/8" or .404". Its .063" on the groove. I can make a 3/8" chain up or if someone wanted I could go pick up a new stihl RS in .404" and include it for my cost. Looking for $90 shipped for the bar and I can do $25 for a 3/8" chain.