Easy way to play higher octave in guitar solos?!

I was playing some avenged sevenfold solos (im getting quite good, technically, my music theory is crap) and noticed it didn't sound quite as cool as it should, then I noticed that ever obnoxious "8va" is above it, trouble is I'm playing on the highest notes of the high E string, I'm guessing they're playing it on a 7 or twelve string or something!? Or is this what that odd little blue "capo" think that I bought four years ago and forgot about is for!? When I put it on it doesn't change anything but open notes!.

I've noticed it in a lot of other solos and it really bugs me!.

Thanks in advance!Www@Enter-QA@Com

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