I would go with the Romeo 5 because the Romeo 7 is a bit big (full-size) and much heavier. I own both. You can have multiple reticles on Romeo 5 XDR too whereas the Romeo 7 is only a red dot. If you plan to add a magnifier that makes the Romeo 7 even longer. Now they do make a Romeo 7S which is smaller I believe. I don’t own one of those. Hope this helps.