Although I won't be able to provide a coder for you, might I suggest looking at example scripts and experimenting a bit?
Bushido's Tier+Tactical weapon pack includes an ammo pickup system, not well documented, but it still works.
Rykuta made some support files waaaaay back for the exact purpose of helping random people create weapons with ease.
The support files can be downloaded from
here and are commented well enough for anybody to understand. There's also an example gun file included in the support package that shows you the format that can be followed.
Rykuta also made some assets and datablocks that basically makes it so much easier to write more guns, since you don't have to make the datablocks yourself.
Link here.If you need further help I might be able to get you in contact with Rykuta, as he really good at scripting weapons himself. PM me if you're interested.