1 Ok. So it looks like you have a laser and a laser/battery box on there. You wouldn't need the box cause you already have a laser. And if you were using it for a battery you wouldn't need it cause you SHOULD have one in the stock.
2. You don't need 2 optics. Ditch the eotech. It's too expensive for you anyways. It should be a long range weapon so use the scope.
3. Ditch the bayonet. Or at least mount it to the barrel. If this is an AIRSOFT GUN you're not going to be stabbing anyone with it anyways........which (BTW) is against the rules because there is no physical contact allowed.
4. Ok. An M203 is cool. But this gun is already going to be heavy enough (if you did it well) and if it's a long range weapon, you won't be within range (if you do your job right) to shoot anyone with it in the first place. Besides, M203's are kind of pointless, if you're with in range and sight to use it, you will definatly be able to shoot them with the rifle instead...and you'll use less bb's.....AND you'll save money. Believe me, I've owned and used one at games.
5. After you throw away the M203 put the bipod on the barrel or RIS if you add that.
One last note. This should be a long range weapon, so you won't be needing a laser. Airsoft lasers will do you no good at more than 20 feet. Actually they probably won't even be accurate within THAT range.
So, in short, you basically need only the scope, bipod, and silencer (you don't REALLY need the silencers actually) out of all the accesories there. Don't over-do it man. If you want to go for milsim, then go for practical. Soldiers carry what they NEED.