It'll cause more problems, what reason to waste time to deploy turret, then load SEC in it, then put there a gun, then load that gun (or put loaded already, but still you'll need to reload it later, if you'll survive...), and then when you'll use it, you'll... just shoot from that gun from one position, so anyone can kill you easily because you'll stand at the same place or some moron can just run from bushes and dismantle your turret, when you can just get that damned gun in your own hands and shoot like now and don't bother with it!
Also you'll need repair alt, who will deploy that useless stationary stuff from where you can shoot your gun and then die.
Ok, noone will dismantle your turret, because noone will tag and increase science skill just to wait till someone deploy turret, still noone need to dismantle it, they will just kill you knowing where you are and knowing that you won't move.
Well from 1st post I understood that you'll need to shoot from it, it won't act like auto-shooting bot, so... what reason? How it's better than simply shooting with your hands? Or you'll be unkillable while using it and they will need to kill turret 1st before you, and it'll have Frank Horrigan's HP?