Never mounted a spitfire to a mini, but have used a fastfire 2, scopes, and strikefire red dot. I used the gg&g 1913 rail on my mini ranch to allow attachment. It has a relief cut in that rail to allow the brass to eject properly. It can be testing to remove the bolt for cleaning, more so with a red dot in that location versus a scope, still a bit tough but possible. You can also go the scout location for mounting a red dot, if that makes anything easier. The go to rails I would recommend for that would be either of these. They allow unobstructed access to the bolt for removal.To you smart guys with experience, where to mount it? Rifle came with a modified Pic rail that goes over the ejection port. Mount RDS there? any issues with removing bolt when cleaning? or add a pic rail foward above the hand guard? Recommendations??