Adding a Flashlight right on the Silencer?
 

I'm thinking of adding a flashlight onto my TM MP5SD5's sliencer using velcro strips. Its a 5 white/blue LED flashlight. If I do this will it harm my silencer/gun? I don't want to screw up the silencer.

The only damage that can occur would be the weight of the light bending or cracking the silencer assembly. Having never toyed with your gun, I can't say if it would be an issue or not.

get a TM figure8 http://www.wgcshop.com/pcart/shoppe...b00f584eb4cd950
it will look less gay and have a more - "real life" look to it.

Don't do that!! It will be ugly and won't hold!

Use a proper mount!