O.K. the only red dot sight I have is the open halograghic type mounted on my S.B.R on the top cover, and I love it. now I need one for a full sized rifle with a side mount rail and a bp-02 mount that centers it with top rail. I am thinking a tube(looking at a 30mm) type red dot would look astetically better on this all black rifle, but wondered if it basically works the same as my open halo one?any cons or pro's comparing the two types? Tom.