Let's say you're going through a boat safty inspection and they ask for your signaling device, and you pull out a M4 with a M203 copy 37mm grande/flare launcher attached
Thats one addition that I don't have that I need!
Another attachment you need is a Beta C 100 rd. twin drum mag, with one of those you can remodel your whole neighborhood without reloading.
As for EOTech or AimPoint ML2/M68, I have several of booth and IMO...I like the EOTech 552/553 better.
For reaching out there, a little 4x ACOG is hard to beat...