Something like this
http://www.ebay.co.uk/itm/12V-5A-Adaptor-AC-Power-Balancer-Charger-MYSTEKY-iMAX-B6-B5-LCD-Monitors-FT-/221810878332?hash=item33a4f5677c:g:ddkAAOSwDNdVjT7X
But with power cable
What foldable stock you have on the mp5k? Because if it's the PDW then you can remove the stock from the endcap, move the sling loop to an other hole and you get that what's on your link.
This:
Or seeing how they suck at their first games they think: it must be the gun!
90% of the guns don't need any internal upgrade. The 10% is when the hopup bucking is crap or the barrel is bent or scratched.
A good clean, 7.4V lipo with deans connector, using good, heavy BBs and setting the hop properly brings every AEG to about the same performance level.
Because those cheap guns perform exactly the same as the £300+ ones. I would take a Cyma AK anytime over a G&G or G&P. If you know what you are doing, you can get better stuff for cheaper. If you don't then it's a safer choice to go for the expensive guns.
GFC is GunFire Custom, meaning it's kjw in your case but they tinker with it. They relube, probably reshim AEG gearboxes, maybe change the spring and test it. I don't know what they do with gas guns, probably just relubing, testing.
I don't get it how it works. The nut seems to be glued in and the bottom part doesn't have a nut. So it seems somehow there is a threaded rod that can move up and down but can't turn.
Not worth £1. Useless as a sniper rifle out of the box, breaks quickly and there are no parts for it to upgrade or replace the broken ones. Not compatible with anything.
The position of the front sling mount is unique to this, if you see that, it's this model. It's an AGM originally.
Not to mention that you can get a brand new Bar-10 for that price and that's a great choice. When it is in stock in Poland that is.