I have never used a OOW and done a few vulcans , I decided just by price. my guess is the oow is better material but they have the misplaced hole issue too. the vulcans may need a hole or two egged out a tiny bit. I honestly think of a vulcan as a GOOD START for cheap. also If I am going to cut one of them up for a folding rear trunion to fit I would prefer it to be a cheaper one just in case.. the only real problem I know opf with the vulcan is the hardness of the ejector and that is repairable, also I think vulcan has addressed this problem for us. for some reason I think oow is better but that is only from other guys posts, also vulcan has a realy BAD reputation and that dosent help. they made some crap for shure but that dose not mean something like a stripped reciever is junk. maby this would make a good seperate thread, if we could keep to exact personal experiance and not all covering bad reputation.
Ps I have a vulcan gun that their conversion COULD NEVER LAST more than a few rounds just by the vulcan design. they had small critical parts getting HAMMERED each round, clearly they would not last at all... so I an not saying everything vulcan dose is good but NOT everything they do is totaly unusable either. hope this helps