It's been said well enough already but it's a message worth repeating.
When a much younger (but no less handsome ? ) hamster was starting out in this hobby he bought himself his favourite gun, a g&g f2000 because bad company 2.
Needless to say as a serial tinkerer it didnt take me long to have the thing to bits and back again, and whilst the g&g implementation of the v6 box is an absolute dream to work on compared to an m4 it just means you can skip right past the easy mistakes and into the sneaky buggers that haunt you for years.
For example, i installed an active brake mosfet after learning the hard way how quickly an 11.1v lipo can eat a set of trigger contacts if you let it. Had it been your common m4 of ak a new set of contacts is no big deal but being an oddball i had to order a whole trigger module from the states.
So began the problems, i could never get it to fire reliably in semi auto, full auto was fine but the lack of semi annoyed me no end. I tried fully rewiring to heavy gauge wire, i tried different motors, i tried different gearing, nothing worked.
And so she sat, for years, i loved and still love the quirky look, but every time i'd bring her out to play the janky trigger (bad enough at the best of times) always had me reverting to something else because even if she was running well i just didnt like using it. Turns out that looking good in a video game and actually handling a thing is a big difference.
Eventually as my constant tinkering continued i ended up throwing in a warfet that was spare from another build and the penny dropped- gone was the semi auto issues that had plagued her the whole time i owned her, turned out all the fettling and filing of trigger components, lining things up just so wasnt actually the problem, it was the damned active brake.
But by this point i was basically an ak convert, turns out that's the platform i most like using/working on, at least as far as airsoft goes.
There are 2 key points from this story:
1. Taking some time, and actually getting hands on with a gun is worth the effort, you might love the looks of a particular platform from video games/movies etc and thats absolutely fine but you may well find that what you actually preferr to use irl is something completely different.
2. Jumping straight into trying to modify your pews, especially when you dont have a clear objective in mind and its your only pew is gonna be a recipe for disaster, trust me the walk of shame when your gun's stopped working or is shooting so wildly you couldnt hit the broad side of a barn from inside said barn gets real old the tenth time it happens and when you're just starting out it will happen a lot.
That isnt to say you shouldnt get into tinkering with your pew, its fun and ultimately quite rewarding and something i absolutely advocate people should have a go at, but it's definately smarter to wait until you've got a reliable spare to fall back on.
As has been mentioned paying someone to work on your pew is a minefield, there are a few about who will do excellent work but just as many who either dont know, dont care or both and will just about go through the motions of fitting whatever expensive parts they think they can convince you to spend money on with no care as to wether or not that will actually improve the guns performance.