This is an old project I started just after releasing the mounted guns a couple of months ago. I got the idea of a buggy with a machinegun from playing BF2, and went into mounting it on the HL2 buggy frame, along with some extra stuff:
The buggy. It has a .50 machinegun mounted to its top, you can stand on a platform on the back and fire it.
Even NPC's can use it! NPC's might not seem to grab the gun properly, but how could I possibly fix that?
Here is a neat detail I decided to add. Every rebel veichle should have its own box of supplies! "+use"-ing the small radio unit here will bring out the crate with health/ammo onto the platform.
Shoot (crowbar or any other weapon) at an item inside the box to "take it" (spawn it). Use the radio unit again to push the box back again.
You can spawn an unlimited amount of supplies, however I reccomend you to only use supplies when you can actually pick them up.
The little button spawns a horde of zombies.
A rebel is nearby. He will seek to step up onto the platform and take control of the gun. He is very skilled with it! He cannot stand there while you drive it around, unfortunately. Maybe if you place this in a multiplayer map, perhaps your friend could act as a gunner?
Obviously the whole buggy with gun and box is fully drivable
Here is the download link. I have included the .vmf and the .bsp in the file (rar format).
Use anything in the .vmf freely, include it in your map as long as I just get mentioned somewhere.
I have submitted it to SourcePrefabs, waiting for them to upload.
New link: http://www.ihud.com/file.php?file=files ... nbuggy.vmf
Pop me an email incase the links are down.