Or, you can purchase a Glock MOS Gen 5 Glock 19 with the co-witness iron sights on the gun. Or you can purchase a Sig and any number of hand guns set up in the same manner. You do not want to lose your rear sight just in case something happens to your red dot.
Every battle rifle I have has some type of co-witness or backup sight configuration, the only guns I don’t bother with adding that extra stuff would be the long guns intended to be able to communicate with people at long distance.
I do not believe in turning any gun into some type of “Frankingun” too much stuff attached is just stupid, if you have been in combat you know ounces equal pounds and you do not want to add junk, keep your guns simple with no more than what you need for their intended purpose. You see people show up at the range and they think they are some kind of one man band with all the crap they have bolted to their AR’s or even worse AK’s, keep it simple stupid!
Red dots are the coming thing, actually they are the shooting world right now, your carry gun if you conceal may not have one but the weapon you keep with you in you car, your battle gun of choice should have a red dot, nothing to line up, put the thing on the thing and pull the bang switch and down goes your problem.