Dust cover ?
 

Hi ! Can anyone tell me which type of m4 aeg metal body can close the dust cover after install the gear box ?
I need the brand and model of metal body to mod my previous one , mine having problem close the dust cover , so need the pro to help here , thanks .

So you want to replace the M4 metal body because the dust cover on yout current one don't close properly? Isn't that a little... extreme?
Replacing M4 metal body involves a lot of adjustment work and the metal bodies can be expensive, so that's typically only done when very necessary. Probably you should try fix the problem on the current body set before considering replacment.
Some informaton for your gun and maybe picture on your current dust cover / ejection port may help.

If you reverse the spring on the dust cover it will hold shut instead of open.

It should remain open when firing anyway. Just take a deep breath and accept it as a part of life :P

duct tape

Maybe he is trying to achieve dust cover of the m4a1 from cs 1.6?
anyways, keep it open and get a fake bolt, maybe a sai style?

Hi All ! Thanks for reply , the questioned I ask is a bit stupid , and I found that the king arms metal receiver is fully function on all the knob and the dust cover also can be close when you didn't play it :D
Also the internal can move too when you pull the T bar ha .. the T bar I said ,what a noob I am , I am not even know the name for those fit on that gun :banghead::banghead:
Please forgive me my lord he .... :infantry::infantry:
I like things to look like real , due to this is my first build , gun is not in perfect , so I try to make it looks better and feel better when I play and when I store it , so actually I am very angry with myself for not going do any deep research ha .
So lets see what is on my gun on that picture k , give me idea what is missing .
Thanks .

Like redzaku said, just toss a fake bolt in it. For example, something like this: http://shop.ehobbyasia.com/king-arms...l#.VUfjrPBw1AU
(do some research on what will fit in your gun. That's just the first result off google)

It covers the ejection port area, so that you see the "bolt" rather than the gearbox.
I think that the "T bar" you're referring to is the charging handle. When you pull that with the fake bolt installed, it will move it back, so that you can adjust your hop up.

I payed $200 for a beautiful g&p MAGpul lower and Vltor upper, and it's dust cover doesn't close.

Hi All ! Thanks for all your comment and idea and info , please take a look on this link , then you will love it :D:D:D
Selling price for usd100 .
http://www.kingarms.com/productpage.asp?prodid=1531
cheers