Here's a short Youtube vid of the AA gun with a difference.
It has 6 grenades as projectiles and the impact is that of a grenade as well. The Damage has been reduced from 400 to 80. You need all 6 to kill with shields at full. It makes for a good long range stun weapon or a close stun switch weps and spray weapon.
We'll see how it fares in the servers. It can always be upped or downed as needed.