(enhancement)

Add a customizable artillery unit (should be put in a separate folder?) that would have a custom model. The model would be similar to the AA gun (base, seat, gun, barrel), but would be aimed in a different way. First, there should be some important fields:

Name, ShortName, Ammo, Icon, Model, NumBarrels, Barrel, ItemID, all of those other AAGun variables.
MinRange -- Minimum range in meters
MaxRange -- Maximum range in meters
Accuracy -- Target deviation in meters
ShootSound -- duh
Mode -- FullAuto/SemiAuto/ForceFullAuto
//ForceFullAuto would mean that the whole magazine/load would have to be fired in one burst.
IncomingSound -- The sound made when the projectile falls toward its target
ShootSpeed -- Will be explained soon

There are two ways that aiming could be implemented:

A. An overhead map (similar to BF3) would be displayed. The map could be scrolled, and the map would be limited to the range of the artillery.

B. Manual aiming could be implemented. Range would be set by either two buttons (up by 50m/down by 50m) or the scroll wheel. Direction would be manually set.

The artillery would be fed by bullet files.

Requires 2 persons to operate?

Considering the amount of people that play in the same server at one, I doubt that two people per artillery piece would be very sensible. Taking one person out of a battle to operate artillery is already plenty.

Make binoculars into spotting tools for artillery perhaps?

That sounds cool. That sounds similar to Forgotten Hope 2's arty system:

1. Spotter spots arty target.
2. Arty operator selects target through reticle (in FH2 it's Q -> hover over Next Target).
3. Arty operator adjusts aim to match the reticle's aim point.
   3b. Arty operator can right click to see overhead view of arty target?
4. Arty operator fires.
5. Boom.
6. Repeat.

http://www.youtube.com/watch?v=uUiFH1G8FIM

Maybe add this for mortars as well if there are any?