I think they're the ones who feel it's necessary to update their auctions right before they finish so you get an annoying email giving you a heads up that the auction is ending soon. I know it's a first world problem but I find it intrusive.
That was the one thing I thought would give them cred. Their listings only indicate items added like a SBH hammer, Wolff spring set, and custom grips. These are non-factory features, but I wouldn't consider them as custom guns.