What is that on the nut of his guitar in the middle? Looks like a make-shift shim made out of aluminum foil because the D string sawed thru the graphite nut...I HATE when that happens. I had to do that with my PRS for awhile until I finally just bit the bullet and installed a new nut myself. If you're a tremolo user -- NEVER get a graphite or self-lubricating nut! Do NOT do it...It's not worth it, it will wear out very quickly and you'll need a new nut every 6 months. Go with Tusq.
In case you're still in the dark about this, it's a hair tie. He uses them to help mute any strings that would otherwise ring out while he's doing two-hand stuff.
It's a Bolt. It's basically Carvin's version of a Strat. I have a couple of them and they're the best guitars I've played. Although Strats are great too, the Carvin has more options for the price.
