You should think about an mk23 with a gspec barrel passed through the suppressor (uping the fps nicely). You can get a stock conversion kit which looks cool and you will have he quietest hit making machine around.
Edit: sorry saw your post. Looks epic!
You can get .66bbs. Infact i had some. Bit pricey but by far the best bbs I have ever used. And no they weren't steel or any other metal. They were zirconia, and perfectly safe as well.
I bought mine years ago, 2010 maybe???? Just off a random forum guy. I had my UKARA Stuff all done through a site so didn't need two tone but the price was right and I didnt care because I always intended to tape and spray it!
Edgi barrels are extremely good. Dont bother with the rest of the bits though. 90° triggers are the way forward.
Try the airsoft sniper parts guys in the uk. Good advice, decent prices and a trusted seller.
Bullet
I wondered how long it would be before I saw these threads. I made the same point. A 45 £ camera a for 200. Not the deal of the century. And for those that lens are about £4. I believe he is using the 16mm for those looking to do it themselves.
Ps. You can just get a tripod mount ris attachment as the mobius comes with a cover with tripod attachment.
Pps. You can do the same with the Sj400/go pro/ basically any action cam
Bullet
Like many have said and will say again, go TM for the quality.
I personally disagree. Go JG or other 100% compatible version (imo jg is the best of the bunch interms of stock etc).
All sniper riles require some form of upgrading (there are free mods that will 100% improve your rifle) so why spend money on TM parts you are going to replace?
Just my 2cents.
Bullet