Hi, in answer to your first question yes it should be possible by the editing the weapons attribute page. You'll want to change the duration in the setup tab and then change the settings in tracking/ normal tabs to a HMG to create a firing cone.
If you want to see the firing cone in game then make sure ui_setfacing is set to weapon default.
To answer your second question I need more information on what's not showing and what you tried to do to fix it.
I am really sorry, this is my first time to use the forum and it is my first time to mod.
Relic Entertainment
cblanco ★ 
보드카 중대 
VonManteuffel 
Heartless Jäger 
