If it is the Pro version it will have graphite printed on some of the parts. Duratrax also make aluminum upgrades for the buggy. Do you get a manual with yours? If not you can download it here -
http://manuals.hobbico.com/dtx/dtxc0022-manual.pdf
Standard a-arm -
http://www2.towerhobbies.com/cgi-bin...?&I=LXCXT0&P=Z
Graphite a-arm -
http://www2.towerhobbies.com/cgi-bin...62&FVPROFIL=++
One of the best things about Duratrax is their price.
Cheers