The RPD with grip and FMJ rounds is a pretty lethal combo. I think the iron sights on it are just as easy to aim with as the dot/holo ones.
Yea I guess your right but I'm used to the holo setup now. I find it so much easier to get a huge K/D ratio with the RPD, mainly due to having to reload less. With a grip its no less accurate or mobile than the assault rifles tbh
The only disadvantage is the reduced sprint time I guess, which you can manage with if you account for it.