Heavy Assault Rifle - Zbrush

This is a SciFi themed weapon I've been working on, I'm in the process of doing the lowpoly version of it at the moment but I felt like uploading the highpoly model I created in Zbrush.
Two magazines has got to be better than one right?

I used "panel-loops" (a function in Zbrush to do panels) a lot during the creation of this model and I've learnt a lot about "insertion brushes" (a way to paint other 3d objects onto a 3d object) and "panel-loops".