Kommandant_Epicness

No insinuation intended. Selling one THAT HAS BEEN ISSUED to you (Caps for emphasis) is illegal. There is a team that looks at this currently but they are probably so over worked.....
 
Apologies for derailing the thread, its just this particular issue is a bit of a bête noire of mine.

Size large Mk6 will fit you fine.

To be realistic get either a Helmet that is too small or so one so huge and vast that it sits at a jaunty angle every time you move - bonus points for a musty odor.

looks like a B500A1, or one in the same range, which i can confirm from personal experience would require you to saw the flash-hider off, same again for the stock pole. inside it's all cheap plastic, but it's balanced as it's all cheap plastic. As others have said, any upgrades is pointless, as you'll have to do the whole thing or you'll have an imbalanced gun that will tear itself apart very quickly. upgrading all it's internals is more expensive than just buying a new better gun anyways
 
It'll do you fine for CQB, and no doubt provide much pleasure when hitting people wearing/using about £1k of equipment. you might get picked off at range abit in woodland sites, but you have to remember it's only firing a plastic ball at people and the difference between airsoft guns is largely academic compared to the difference in how you use one (pointing it in the right direction etc hehe)
 
Guess you're best off sticking with it until your parents are convinced you're dedicated enough to the hobby to merit another gun.

What you could do, is get some upgrades which will still be usable for when (note when, not if) it breaks, because it almost certainly will break sooner rather than later. So don't waste money on trying to tart it up internally, just use its capabilities to best advantage, by doing the following, none of which will be a false economy...
 
So, a decent sight will be usable on a new gun just as much as it will on that thing, a decent three-point sling will too, as will a tactical light and a tactical front foregrip, none of these items need to cost too much money, none require a UKARA, and all will easily be usable on a new gun when you get hold of one. All will at least make the gun a bit more usable, i.e. you can spend some time zeroing the sight in, to shoot more accurately, a three point sling will allow you to get it into your shoulder quicker and make it less of a pain in the ass to carry, a tac light is useful for indoor CQB, whatever gun you happen to be using, and a tactical foregrip will improve your accuracy and speed up you acquisition of targets, and you can put the thumb switch for the tac light onto it with some gaffer tape.

Seems that way, thanks for your help!

If your mum says you have to use it make do with it just now just keep it. Goto some games with it and use and abuse it. The good thing about having a cheap gun if it dies it's not a huge loss. It might last until you get UKARA membership and you can buy a RIF. If you took the stock off it would look quite a cool SMG

The things you've mentioned in your post are external modifications, not upgrades. The airsoft definition for an upgrade is, in short, a better than standard internal part used to replace standard internal parts. Batteries are just consumables that have an effect on rate of fire.
As Bulldog shorty M4 AEGs (and almost all low-end guns) cannot be easily upgraded, I would suggest saving your money for a better AEG (over £130 RRP at least) until your current gun breaks.

Cheers.

What helmet do you mean?
Have a look on Ali-Express and AirsoftPeak (both Asian retailers, AirsoftPeak are great, I've ordered from them three times already, Ali-Express not as trustworthy as it's individual sellers)
 
Emerson FAST helmets go for ~£30, and they're around £60 here in the UK.
Alternatively you could always look for one second hand of course.

Same as Monty as said G&G Combat Machines are great! We always recommend them. Sidearms are fun but it's better to buy good kit and spend money on your rifle (like batteries / magazines and things) before buying a pistol.

You don't need one, focus on gear.

The CM16 is an excellent gun for the money, incredibly reliable.
 
The TM T21 was designed for kids. It's smaller than the real thing, has very low fps and overall not very skirmishable.

I would avoid the paintball mask and go for a pair of mesh goggles and a mesh lower face mask. Mesh doesn't fog up and if you get thirsty, you cannot drink in a full face mask. Also it looks like it would reduce headwear options.
Take a look at some cheap camo gear here: http://www.britishmilitarysurplus.co.uk/shop/special-offers.html
 
A good way to start is a set of DPM, boonie hat, gloves, a scrim scarf or shemagh (to protect your neck), good boots and a cheap tactical vest.
This is how I started, but these days I go for a more old school look
 
I do mainly WW2 gear now and I have to say that Webbing seems to be rather underappreciated in airsoft circles. Webbing is a very viable alternative to the tactical vest. A set of '58 pattern webbing will cost around £10-15 and will carry everything a tactical vest will but won't act as an additional layer of clothing to make you hot. '58 pattern seems to be the cheapest at present, newer PLCE stuff would cost £25+ and my '37 pattern webbing cost me £30. If you want the benefits of both, consider a molle belt and support straps or a simple chest rig.

Okay, thanks for the help!

You are best off avoiding any form of vest/webbing/plate carrier until you have things you need to put in it. Wearing a plate carrier for a single spare hi cap makes you look like a twit.
 
A good pair of surplus boots, and a pair of surplus trousers from your local army surplus shop (google it) or Ebay. I got an Olive, Tan and Black fleece from decathlon for £4 each, they go with most loadouts and are not too bulky now the weather is changing.
 
Gear is a cycle, you start with nothing, then you buy everything! loadout with 6 hicaps 3000 bbs, 3litres of water and wonder why your knackered after 2 hours, then you ditch it all and return to running mags in your pockets and then you load up again, each time the circle rotates, the price of the gear gets exponentially more expensive.

Forget the paintball mask - it will give you problems with fogging.
 
Have a read of this.

so maybe buy a cheap eotech, honestly everyone says the clones are exactly the same as the branded ones, you can pick them up for £30. how much mney you willing to spend. Ideally you want a LiPo (mine cost £20 and is a beast) and you will need a cranestock, I will get the link for mine. Also you need a smart charger, I use the accucel digital 6 that can charge everything from lead acid to LiFe and everything in between. It has an LCD display and is brilliant. that will set you back £70 including the battery (although you can get cheaper) which is what I run, seriously good setup IMO.. You want some mags, probably mid caps you will find (not so annoying as winding up Hi caps) and as monty said either a molle plate carrier or something along the lines. If I were you I would get the gun, good gear and everything else meaning that if you want to buy another gun, you have everything you need for that as well, instead of spending a huge amount on one gun. That mask is fine although it may steam up quite a bit.

I suppose one can never have too many M4's.

Leave the optics until later on, but good choices so far. Molle vests are pretty cheap so I'd recommend getting a plate carrier and some M4 magazines pouches.