Some smoke grenade model I whipped up in a short amount of time...
EDIT: I updated the model and it looks more like a smoke grenade now
Here's what it looks like:

(Yes, at the top of the window, that is my name)
The download (If you care) :
http://www.mediafire.com/?4n21xxijxto(Note: The file is in .Blend format. Have someone convert it for you because I can't right now)
Personally I don't expect it to go very far...I just wanted to see what you think...
The BAR was a suggestion I had for a weapon. In that, I decided to submit the model, and stuff, to see whether someone could make of it.
The topic:
http://www.blockland.us/smf/index.php?topic=25242.0(Note: I didn't make the BAR model)