This is really nice but the only thing needs work is the at some parts it seems your riff fails to stay on tempo. So either when your playing you need to push the tempo in your riff a little, or make sure the tempo is exactly the same for your riff and your drums. That way neither falls behind or ahead. Other than that i love it! :)
I know the silent parts, or cuts as I'm gonna call them, sound weird but they do have a purpose. They are for vocals. I'll explain.
During the first and last cut there would be a silent "power walk".
The middle cut is there for timing reasons and also to give a bit of character. The reason why (when the track continues) it sounds weird is because I forgot about it, so I just deleted the unneeded part and left it so.