You're asking for too much for too little.
You're also asking for something that doesn't really fit well into a close quarters role. You're honestly just better off accuracizing an AEG and cutting it off to Semi Auto or something.
If anything ,I did see a mod where a guy cut down a cheap VSR-10 clone down to nothing, i'm not sure if accuracy was compromised due to doing so though.
Open up your budget and the possibilities are endless.