I am looking to mount a red dot scope and magnifier on my Bushmaster AR15. I really like these and they are in my price range https://www.primaryarms.com/Primary_Arms_3X_Red_Dot_Magnifier_GEN_III_p/pa3xgeniii.htm https://www.primaryarms.com/Primary_Arms_MultiReticle_Red_Dot_Sight_PAM3M_p/pam3m.htm The problem is I would rather not replace my existing stock iron sights if I don't have too. Is there a way to mount these where I can still use my irons sights or will that front sight just be too high and or field of view be blocked by the scope mounts. The mounts would have to be angled as I don't have a floating rail. If I was to add a rail to the carry handle and mount the scope there how would that work out?