Welcome 🤚
Its a bit before my time so I don't know what may have changed mechanically since then but the minimum you should do is open up the gearbox and clean/re-lube. You'll likely need to change the piston O-ring and change the main spring.
I'm sure others will comment with better info.
Yeah, just plastic fantastic. From the video's I've seen they're junk. No hop and only a few meters with any accuracy.
Feel sorry for the Aussies that only have that to play.
Welcome 🤚
Presuming you are in the UK
Your parents will not be able to buy a non two tone (RiF) unless they have UKARA registration so the only option at the moment is two-tone.
It may be disappointing but its easier to show they are toys if someone sees you playing in the field.
You have to make sure BBs do not leave the area of the field and you must stop play if someone is nearby who can get hit with a BB.
Oh, and make sure you and friends have good eye protection. That can get serious real quick.
I'll say its better to get an extra magazine for your rifle than go for an AEP.
I used to carry a pistol too but only used it a couple of times at all and the hassle of prepping it and clearing after a game was almost not worth it.
Only snipers and DMR truly need a secondary.
I still think the Raven is good enough to get a feel for their use without breaking the bank but if you can't even afford gas then best forget the idea until you have more money collected.
As said before, the options you have listed (or any in that price range) will be a good start and will perform about the same. Just get the one you like the look of most.
Clearly the Raven (Nuprol) being so cheap will be lower quality than more expensive options but its an introduction to blowback pistols within your budget. If it doesn't work properly you can return it.
Keep in mind it probably won't last as long as more expensive options but it may be OK.
I have a few by Vorsk which are also budget options by Nuprol and they perform adequately with no problems so far.
As above, I would urge you to forget an AEP. They are quite inefficient and underwhelming.
HERE is the lowest price GBP that will give you the experience of proper blowback action but may not be as accurate or consistent with more expensive ones.
Of course you'll need some gas and I recommend THIS one. (Of course its cheaper if you buy in bulk)
OR
THIS one is quite highly regarded as more powerful but without the blowback action (which is half the fun in my opinion)
The mAh is not a measure of the power when you pull the trigger. Its the total power it can hold so how long it should last.
I think those batteries are faulty especially if you say other batteries work.
That does seem to be a low battery but very strange as its an 11.1
Your Imax B6 looks quite different to mine. (I have the V2)
There should be a specific battery test mode in the top menu.