How to Trade Up to MP9 | Rose Iron
MP9 | Rose Iron drops from Winter Offensive Weapon CaseWinter Offensive Weapon Case, Winter Offensive Weapon Case, Winter Offensive Weapon Case, Winter Offensive Weapon Case, Winter Offensive Weapon Case, Winter Offensive Weapon Case, Winter Offensive Weapon Case, Winter Offensive Weapon Case, Winter Offensive Weapon Case, Winter Offensive Weapon Case, Winter Offensive Weapon Case, Winter Offensive Weapon Case, Winter Offensive Weapon Case, Winter Offensive Weapon Case, Winter Offensive Weapon Case, so any contract that can produce it needs 10 Mil-Spec skins from those same cases. Here is what the contract costs, what else it can land on, and the input float you need for each exterior.
- Odds per contract
- 25% 1 in 4
- Contract cost from
- $1470.00 10× cheapest input
- Expected value
- $690.25 mean of the outcome pool
- Margin
- -53% $-779.75 per contract
Buying is cheaper than rolling. A Field-Tested MP9 | Rose Iron costs $657.00 outright, against $1470.00 for a contract with a 25% chance of producing one. Trade up for the process, not the value.
The contract
Ten inputs, all Mil-Spec, all from Winter Offensive Weapon CaseWinter Offensive Weapon Case or Winter Offensive Weapon Case or Winter Offensive Weapon Case or Winter Offensive Weapon Case or Winter Offensive Weapon Case or Winter Offensive Weapon Case or Winter Offensive Weapon Case or Winter Offensive Weapon Case or Winter Offensive Weapon Case or Winter Offensive Weapon Case or Winter Offensive Weapon Case or Winter Offensive Weapon Case or Winter Offensive Weapon Case or Winter Offensive Weapon Case or Winter Offensive Weapon Case. Concentrating every input in one case is what keeps your odds at 25% — mixing cases splits the probability across both pools and lowers your chance at MP9 | Rose Iron specifically.
Galil AR | Sandstorm
Galil AR | Sandstorm
PP-Bizon | Cobalt Halftone
M249 | Magma
PP-Bizon | Cobalt Halftone
M249 | Magma
M249 | Magma
Galil AR | Sandstorm
PP-Bizon | Cobalt Halftone
M249 | Magma
Five-SeveN | Kami
M249 | Magma4 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 Winter Offensive Weapon CaseWinter Offensive Weapon Case / Winter Offensive Weapon Case / Winter Offensive Weapon Case / Winter Offensive Weapon Case / Winter Offensive Weapon Case / Winter Offensive Weapon Case / Winter Offensive Weapon Case / Winter Offensive Weapon Case / Winter Offensive Weapon Case / Winter Offensive Weapon Case / Winter Offensive Weapon Case / Winter Offensive Weapon Case / Winter Offensive Weapon Case / Winter Offensive Weapon Case / Winter Offensive Weapon Case draws uniformly from every Restricted SMG skin in the pool, so MP9 | Rose Iron is one of 4 equally likely results. These are the other 3.
| Outcome | Odds | Cheapest price |
|---|---|---|
| FAMAS | Pulse | 25% | $1004.00 |
| MP9 | Rose Ironyour target | 25% | $657.00 |
| Dual Berettas | Marina | 25% | $618.00 |
| Nova | Rising Skull | 25% | $482.00 |
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 MP9 | Rose Iron’s range of 0.00–0.30. 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 | 0.1167 |
| Minimal Wear | 0.1100 | 0.3667 |
| Field-Tested | 0.2250 | 0.7500 |
| Well-Worn | — | not reachable |
| Battle-Scarred | — | not reachable |
“Not reachable” means MP9 | Rose Iron’s own float range never enters that exterior band — no combination of inputs can produce it.
What MP9 | Rose Iron 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 |
|---|---|---|
| Field-Tested | $657.00 | −$813.00 |
| Minimal Wear | $694.00 | −$776.00 |
| Factory New | $1351.00 | −$119.00 |
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.