Thanks MR, but to be honest, that site is a cheapo 15$ dollar job from affordable airsoft - they are very close to me, and I thought it looked kinda cool.
It projects a red dot onto a plastic pane, and it's surprising how well it actually works for being so cheap. It's mostly metal and has adjustments for zeroing that are half decent. All in all, I really like it, and it was dirt cheap.
I love Nitro.vo parts, and that folding grip is awesome. I'll probably put one on every SMG I get from now on