This could not be an issue at all and could be by design in K2 and/or SE, but in a previous game (that didn't have either K2 or SE) I didn't have any issue with turrets and being able to fire over walls or one another (unless it specifically needed direct LOS). However, within K2 and/or SE every modular turret destroys whatever is in front of it.

Anyone else run into this?

I'm running K2 currently and turrets behave normally. Do you have any combat altering mods beside K2 or SE?

thanks for a great mod.
having the same thing, also K2 and SE, but also a bunch of other mods.
my guess is on Rampant or one of Schalls.
Howitzer and Vortik's Cannon turret (which I also have) shoot over walls like normal. Probably because they use custom ammo though.

I've checked both SE and K2, none of those have problems you mention. Rampant itself doesn't have any weapon addition.

I haven't played with Rampant Arsenal nor any of the Schall's mods, but it must be one of those that is causing this problem.

thanks for the reply. I have guessed Rampant because it says

No Homing Projectiles - All projectiles are fired at locations and no longer track the player

the issue occurs if I put Explosive Cannon Shell (75 mm) (tank shell) into cannon turret. Specialized ammo works fine.