That would be hopup and/or tappet plate related then.

Vlad told me he will exchange it, so I will get a M4 or M16 instead. Single Firing mode is really important to me as I don't like to spray.

Is it double feeding as in you get 2 shots with one pull or one "blank" shot then 2 bb's coming out? I had my gun (M4) do the double feeding thing and the culprit was in fact the BB's I was using. Otherwise it seems to be functioning perfectly and I would really just leave it be unless you really want that M4.

I tried with different kinds of BB and it does it with all.

Ok, does it fire 2 bbs.. or does the mechbox actually cycle twice? If it's the problem I'm thinking of, the mechbox actually cycles twice.

I covered that already a few posts up, cycles once fires 2 (shotgun)

I'm talking about a different problem -cycles more than once on semi, firing a single BB each time.

Ok so I got to the store, and of course the gun was now behaving properly when Vlad tried it :banghead: Anyway he let me choose another gun, so I took an ICS M4 with a silencer, I really like the gun, however, I got home and the wrong battery was in the box, I go back to the store again (another 50km) to get the battery swapped to the 2800mAh but then he doesn't have the proper connector for the charger.

Anyway the connector I can deal with at any electronic store, but if you buy stuff from this store you better check what you are leaving with before you get home, I drove 150KM total to get to this point, and I am still missing a connector.

:D

Any hobby/electronics store should carry the right connectors. If you paid attention during (or even took) shop/electronics class you should know enough of the basics to competently solder the connectors.

If it's a wall charger toss it out as soon as you can and get a "real" charger any RC/hobby shop will carry the charger that you should be using.

I have no worries about that, if I can build a computer I can solder a connector. About the charger, what is wrong with the tiny wall plug I got? Is it going to cause me problems?

What should I buy?

Dumb wall chargers are crap and will damage your batteries. Buy a good smart charger with "peak detection" or "Delta-V detection". Smart chargers stop charging when they detect the pack is full.