ok take a tip from me, watch my videos, make you own weapon first, learn how to use 3ds max, then try again.
the thing called group is you weapon, it is a "Group" mesh eg lots of parts "grouped" together you need to ungroup it then attach all the parts together, in the "select by name lister" (hotkey H) make sure you can see everything you may have switched something off
- Warhammer 40,000 for UDK
- UT3 Tutorials - Characters - Weapons - Vehicles - FaceFX
UDK Tutorials - Basics - Vehicles - Characters - Weapons