I have the V5 myself, took me a coupe hours to get it out of mean, lol. If I remember correctly, the V5 is the internals of the V3 in the body of the V2. Perhaps that's what your salesman intended to say.
Putting them on my kpt3's for now until my .357's arrive. Then onto an already tall SVD, it looks like I'm vaping the space needle. I like them though, I'm a stainless steel kind of person though.