It's a horn and banner replacment: http://i.imgur.com/NjQLSFF.jpg?1
There is little to no tutorials on how to compile weapon models. I've been trying to find out how using Helljumper's older hat modeling tutorial and searching around elsewhere; after a few hours yesterday and a few today I'm calling it quits. I feel as if Valve is overdue for adding weapons to the beta import tool, but i'd like to get this uploaded now.
Maybe I should be asking this on a more active forum, but I've never been a member on any. First I'll just see how this goes.