EMP Grenades! If you have high throw skill they are really good against turrets. If you invest 3 points in electronics at chargen, you’ll have Electronics 4 and the recipe from the start. Otherwise you need 5 Electronics and a copy of Advanced Electronics, or the Anonymous Anarchists Annual variant of the AAA Guide 2040. Obviously you have to stand outside of the turrets range and inside of your throw range to make good use of it.
The only required tools are a soldering iron, which you can make from the start if you invest 2 points into Electronics to get Electronics 3, and a screwdriver, or screwdriver set.
All of the necessary components except the long string can be obtained by disassembling a broken console. Long strings can be found in ample supply by tearing down curtains in houses. If you have high enough mechanics (I believe it requires 2 or 3), and a screwdriver, which you’ll have anyway if you’re doing this, you can also remove the seatbelts from cars and trucks and you’ll get short ropes. Short ropes can be disassembled into long strings.
The best part of EMP Grenades is that even if one goes off on you it won’t actually hurt you. It will drain any power you have in power storage bionics, though. Another absolutely brilliant part of the EMP Grenades is that they may shut the turrets down instead of destroying them. If it successfully shuts the turret down it will become inactive, and you can pick it up and redeploy it elsewhere to make it friendly.
If you’d like I can give you a breakdown on how to get into Labs and Bunkers safely using only a Jackhammer and EMP Grenades.