And at the same time, it doesn't really matter if you go to games without your team. There's a lot of players, including some of the "Ancient" (lol) that are "freelance" players.
So for your gun, assuming it's a decend company, I'd also advice an upgrade. Maybe you could look in the classifieds if there's another AEG that's "rare" enough for you?
You should also know that one of the great points of the M4 platform is the customizability you can get with it. You can really personnalize it a lot, from recežvers to front end, stock and even motor cover plates, so maybe look at others builds to get an idea?