How to Trade Up to Dual Berettas | Marina
Dual Berettas | Marina drops from Winter Offensive Weapon 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
- 25% 1 in 4
- Contract cost from
- $11.50 10 × cheapest input
- Expected value
- $5.77 mean of the outcome pool
- Margin
- -49.8% $-5.73 per contract
Buying is cheaper than rolling. A Field-Tested Dual Berettas | Marina costs $4.41 outright, against $11.50 for a contract with a 25% chance of producing one. Trade up for the process, not the value.
The contract
10 inputs, all Mil-Spec, all from 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 Dual Berettas | Marina specifically.
PP-Bizon | Cobalt Halftone
M249 | Magma
PP-Bizon | Cobalt Halftone
M249 | Magma
PP-Bizon | Cobalt Halftone
Galil AR | Sandstorm
M249 | Magma
Galil AR | Sandstorm
M249 | Magma
Galil AR | Sandstorm
Five-SeveN | Kami
Five-SeveN | Kami4 further eligible inputs are available — open the reverse trade-up finder to price a full contract against your own inventory.
What else this contract can land on
A contract from Winter Offensive Weapon Case draws uniformly from every Restricted Pistol skin in the pool, so Dual Berettas | Marina is one of 4 equally likely results. These are the other 3.
| Outcome | Odds | Cheapest price |
|---|---|---|
| FAMAS | Pulse | 25% | $7.84 |
| MP9 | Rose Iron | 25% | $6.17 |
| Nova | Rising Skull | 25% | $4.65 |
| Dual Berettas | Marinayour target | 25% | $4.41 |
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 Dual Berettas | Marina’s range of 0.05–0.50. To land a given exterior, your ten inputs must average the normalised float below.
| Target exterior | Output float | Required avg. input float |
|---|---|---|
| Factory New | 0.0600 | 0.0222 |
| Minimal Wear | 0.1100 | 0.1333 |
| Field-Tested | 0.2650 | 0.4778 |
| Well-Worn | 0.4150 | 0.8111 |
| Battle-Scarred | 0.4750 | 0.9444 |
“Not reachable” means Dual Berettas | Marina’s own float range never enters that exterior band — no combination of inputs can produce it.
What Dual Berettas | Marina 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 | $4.41 | −$7.09 |
| Minimal Wear | $5.96 | −$5.54 |
| Battle-Scarred | $10.24 | −$1.26 |
| Well-Worn | $10.32 | −$1.18 |
| Factory New | $25.35 | +$13.85 |
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.