Gunsmith's suitcase

After City clearing operation, Dragunov told you about the Gunsmith's note he found in his apartment. It said that
* The Gunsmith's case can be found in Jupiter, in a tunnel near the cooling tower.
* One of the keys to the case is in an observation tower near the Yanov station.
* Second key to the case is in a small box inside a large building at the cement factory.
The Gunsmith's note ends with a warning: "I must not forget to turn off the security system at the factory when I'm back. That's the way the cookie crumbles!"
== Walkthrough ==
=== First key and the case ===
Head over to Jupiter and go to the [ observation tower]. It's occupied by Aaz. Talk to him about the key. He will give you the quest named Wolf's lair, in which you obtain both the case itself and the first key.
=== Second key ===
The second key can be found at the [ cement plant]. The plant is protected by a small Monolith squad. There are also six turrets inside:
1 - on the top floor, visible immeditately after dropping down the hatch on the roof.
2 - before the hole in the top floor.
3 - under the hole, in the corridor.
4 - the next floor down the staircase.
5 - the floor down of that one. 
6 - the next staircase.
The key itself is inside a desk in the room next to hole in the floor, after dropping down the hole.
=== Opening the case ===
After obtaining the second key, you open the case and discover ORSIS T-5000 in it. This is a precise sniper rifle which does roughly 2x the damage than most other rifles using the same 7.62x51mm ammo.
In the case, you also discover a PDA with a note, leading to Phantom pain.
== Notes ==
* You can obtain the second key without having this quest in your PDA.
== Bugs ==