Two nice ones here locally...I have a new 640,and I wouldn't mind grabbing one of these to add to it while I have the cash to do it...I know the m60 is stainless,but I don't know much about the 36...both are pre lock,and look great they're both priced between $400 and $500, the higher one the m60...I looked them up but am curious as to the differences in these peices...I believe the 36 is an airweight,correct? Is one considered a better gun than the other? Are they priced correctly? Any info appreciated...