Honestly, for what you're trying to achieve, you might be better off buying a carbine length AEG and make it into a short 'DMR' style setup.
I've tried the Shortened bolt action/sniper rifle thing and you don't really benefit from it in any way.
This is as short as you can realistically get a VSR-10 platform. The Barrel is only 4 or so inches long and the cylinder had to be ported to keep it relatively stable. And even then, there is little going for it when it comes to a 'longer range' platform. The next step would to build off of a Gspec without the suppressor.
Alternatively. You could get a KJ KC02 (Ruger 1022) replica, mod on a hogue stock and get the CQB barrel length kit. The thing is still incredibly accurate and much shorter, too. Lot of options to decrease the FPS to safer levels, too. I finished building one for this years gaming.