[e-luder]

Originally Posted by kar120c

Is it possible to put a custom rear plate like these http://www.rockyourglock.com/parts/BlackSCPs.htm to am Airsoft Glock?
I know this should be a troubled Dremel work but I ask you if anyone has made it

No.

THe Tokyo Marui Glocks have an integrated cover plate. the BBU is one piece and it includes the backplate...

It may work for the KSC/KWA line because of the proper dimensions. But as you said, you'd have to modify the hell out of the RS coverplate you're looking at.
That RS plate has to house a retention spring for he firing mechanism on a RS Glock. Plus you'll have to combat all kinds of fitting issues if want to mount THAT thing on an Airsoft Glock.

Another one that could be possible is the VFC/Stark Arms Glocks. They have a seperate cover plate like the RS Glocks do.

But Again, as you specified, you'll need a lot of dremmel work fit it and then find someway to lock it into place so that it doesn't drop out during operation...