Can you link the tabs? I'm not totally sure what your talking about.
right now im thinking
Barrel
http://store.matrixbb.com/servlet/-s...29-Star/Detail
http://cgi.ebay.com/SYSTEMA-6-04-BS-...QQcmdZViewItem
and if its worth the extra money
http://cgi.ebay.com/PROMETHEUS-6-03-...QQcmdZViewItem
two of these or 4 magazines
http://cgi.ebay.com/MAG-G36C-Mid-Cap...QQcmdZViewItem
And for hopup what would you guys suggest?
Eventually i'll get to upgrading the gearbox, but i don't think i want to take that apart yet.