How to Trade Up to MP5-SD | Gauss
MP5-SD | Gauss drops from Prisma Case, so any contract that can produce it needs 10 Mil-Spec skins from that same case. Here is what the contract costs, what else it can land on, and the input float you need for each exterior.
- Odds per contract
- 20% 1 in 5
- Contract cost from
- $2.10 10 × cheapest input
- Expected value
- $1.26 mean of the outcome pool
- Margin
- -40% $-0.84 per contract
Buying is cheaper than rolling. A Battle-Scarred MP5-SD | Gauss costs $0.55 outright, against $2.10 for a contract with a 20% chance of producing one. Trade up for the process, not the value.
The contract
10 inputs, all Mil-Spec, all from Prisma Case. Concentrating every input in one case is what keeps your odds at 20% — mixing cases splits the probability across both pools and lowers your chance at MP5-SD | Gauss specifically.
P90 | Off World
MP7 | Mischief
P90 | Off World
FAMAS | Crypsis
MAC-10 | Whitefish
FAMAS | Crypsis
Galil AR | Akoben
P90 | Off World
MAC-10 | Whitefish
P250 | Verdigris
FAMAS | Crypsis
MP7 | Mischief12 further eligible inputs are available — open the reverse trade-up calculator to price a full contract against your own inventory.
What else this contract can land on
A contract from Prisma Case draws uniformly from every Restricted SMG skin in the pool, so MP5-SD | Gauss is one of 5 equally likely results. These are the other 4.
| Outcome | Odds | Cheapest price |
|---|---|---|
| AWP | Atheris | 20% | $3.54 |
| Desert Eagle | Light Rail | 20% | $1.01 |
| UMP-45 | Moonrise | 20% | $0.63 |
| Tec-9 | Bamboozle | 20% | $0.56 |
| MP5-SD | Gaussyour target | 20% | $0.55 |
Input float for each exterior
CS2 normalises float across a trade-up: each input’s float becomes a 0–1 position inside its own range, those are averaged, and the average is applied to MP5-SD | Gauss’s range of 0.00–1.00. To land a given exterior, your ten inputs must average the normalised float below.
| Target exterior | Output float | Required avg. input float |
|---|---|---|
| Factory New | 0.0350 | 0.0350 |
| Minimal Wear | 0.1100 | 0.1100 |
| Field-Tested | 0.2650 | 0.2650 |
| Well-Worn | 0.4150 | 0.4150 |
| Battle-Scarred | 0.7250 | 0.7250 |
“Not reachable” means MP5-SD | Gauss’s own float range never enters that exterior band — no combination of inputs can produce it.
What MP5-SD | Gauss is worth right now
Worth comparing against the contract cost above before you commit: buying the skin outright is frequently cheaper than rolling for it.
| Exterior | Price | vs. contract cost |
|---|---|---|
| Battle-Scarred | $0.55 | −$1.55 |
| Well-Worn | $0.58 | −$1.52 |
| Field-Tested | $0.64 | −$1.46 |
| Minimal Wear | $1.14 | −$0.96 |
| Factory New | $4.23 | +$2.13 |
Build this contract
Price a full ten-slot contract against live inputs, set your own float values, and see the outcome odds update as you go.