I'd rather this didn't progress any further down this slippery slope, there are enough trolls on the internet without us making it worse.
M1LAN I apologise for my comment.
For what it's worth, the range of AR style of GBBR's, AEG's & accessories are endless, my own preference is for realistic military clones (as the pic shows), almost every pic I've seen with military rifles have some kind of addition/accessory whether it's unit specific or an individuals preference. If you want your AR to have a realistic feel & kick then GBBR fills that niche, however if you're a regular player or intend to be one then I'd suggest an AEG with NGRS, gas is fiddly & a pain in the arse (certainly more work than I'm willing to do on a regular basis) especially in our cold UK weather. There are many versions or AR's to consider and pretty much every one can be accessorised & updated as your want or need progresses, out of the AR's I have, only 1 is stock, many of them were bought from the classifieds & some might have been upgraded internally before I bought them but I don't play much so I prefer a look to performance so I just add the accessories I want & try to make them all different.
If you want a milsim type of gameplay then it depends how far down the rabbit hole you want to go, full milsim with a GBBR will require many expensive mags as they hold limited ammo, an AEG with the same milsim feel will be a fraction of the cost, using midcap mags will give you a realistic reload feel as you'll need more mags (which are much cheaper).
If you're determined to go down the GBBR route, I love my WE XM177 but I've been lucky enough to find second hand mags to allow me to spray & pray or pick my shots but I've yet to have a full game without some kind of issue either small or catastophic & the mags weigh a tonne.