How to Trade Up to FAMAS | ZX Spectron
FAMAS | ZX Spectron drops from Operation Riptide CaseOperation Riptide Case, Operation Riptide Case, Operation Riptide Case, Operation Riptide Case, Operation Riptide Case, Operation Riptide Case, Operation Riptide Case, Operation Riptide Case, Operation Riptide Case, Operation Riptide Case, Operation Riptide Case, Operation Riptide Case, Operation Riptide Case, Operation Riptide Case, Operation Riptide 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
- 20% 1 in 5
- Contract cost from
- $670.00 10× cheapest input
- Expected value
- $362.60 mean of the outcome pool
- Margin
- -45.9% $-307.40 per contract
Buying is cheaper than rolling. A Battle-Scarred FAMAS | ZX Spectron costs $247.00 outright, against $670.00 for a contract with a 20% chance of producing one. Trade up for the process, not the value.
The contract
Ten inputs, all Mil-Spec, all from Operation Riptide CaseOperation Riptide Case or Operation Riptide Case or Operation Riptide Case or Operation Riptide Case or Operation Riptide Case or Operation Riptide Case or Operation Riptide Case or Operation Riptide Case or Operation Riptide Case or Operation Riptide Case or Operation Riptide Case or Operation Riptide Case or Operation Riptide Case or Operation Riptide Case or Operation Riptide 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 FAMAS | ZX Spectron specifically.
PP-Bizon | Lumen
G3SG1 | Keeping Tabs
Dual Berettas | Tread
MP7 | Guerrilla
Dual Berettas | Tread
AUG | Plague
USP-S | Black Lotus
AUG | Plague
USP-S | Black Lotus
G3SG1 | Keeping Tabs
Dual Berettas | Tread
MP7 | Guerrilla12 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 Operation Riptide CaseOperation Riptide Case / Operation Riptide Case / Operation Riptide Case / Operation Riptide Case / Operation Riptide Case / Operation Riptide Case / Operation Riptide Case / Operation Riptide Case / Operation Riptide Case / Operation Riptide Case / Operation Riptide Case / Operation Riptide Case / Operation Riptide Case / Operation Riptide Case / Operation Riptide Case draws uniformly from every Restricted Rifle skin in the pool, so FAMAS | ZX Spectron is one of 5 equally likely results. These are the other 4.
| Outcome | Odds | Cheapest price |
|---|---|---|
| MP9 | Mount Fuji | 20% | $539.00 |
| M4A4 | Spider Lily | 20% | $527.00 |
| Five-SeveN | Boost Protocol | 20% | $317.00 |
| FAMAS | ZX Spectronyour target | 20% | $247.00 |
| MAG-7 | BI83 Spectrum | 20% | $183.00 |
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 FAMAS | ZX Spectron’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 FAMAS | ZX Spectron’s own float range never enters that exterior band — no combination of inputs can produce it.
What FAMAS | ZX Spectron 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 | $247.00 | −$423.00 |
| Well-Worn | $250.00 | −$420.00 |
| Field-Tested | $321.00 | −$349.00 |
| Minimal Wear | $616.00 | −$54.00 |
| Factory New | $3143.00 | +$2473.00 |
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.