How to Trade Up to M4A1-S | Emphorosaur-S
M4A1-S | Emphorosaur-S drops from Revolution 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
- $0.70 10 × cheapest input
- Expected value
- $0.37 mean of the outcome pool
- Margin
- -47.1% $-0.33 per contract
Buying is cheaper than rolling. A Battle-Scarred M4A1-S | Emphorosaur-S costs $0.44 outright, against $0.70 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 Revolution 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 M4A1-S | Emphorosaur-S specifically.
P250 | Re.built
SCAR-20 | Fragments
SG 553 | Cyberforce
Tec-9 | Rebel
SG 553 | Cyberforce
P250 | Re.built
P250 | Re.built
MAG-7 | Insomnia
Tec-9 | Rebel
SG 553 | Cyberforce
SCAR-20 | Fragments
MAG-7 | Insomnia12 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 Revolution Case draws uniformly from every Restricted Rifle skin in the pool, so M4A1-S | Emphorosaur-S is one of 5 equally likely results. These are the other 4.
| Outcome | Odds | Cheapest price |
|---|---|---|
| M4A1-S | Emphorosaur-Syour target | 20% | $0.44 |
| Glock-18 | Umbral Rabbit | 20% | $0.38 |
| P90 | Neoqueen | 20% | $0.36 |
| MAC-10 | Sakkaku | 20% | $0.35 |
| R8 Revolver | Banana Cannon | 20% | $0.34 |
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 M4A1-S | Emphorosaur-S’s range of 0.00–0.80. 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 | 0.0438 |
| Minimal Wear | 0.1100 | 0.1375 |
| Field-Tested | 0.2650 | 0.3313 |
| Well-Worn | 0.4150 | 0.5188 |
| Battle-Scarred | 0.6250 | 0.7813 |
“Not reachable” means M4A1-S | Emphorosaur-S’s own float range never enters that exterior band — no combination of inputs can produce it.
What M4A1-S | Emphorosaur-S 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 | $0.44 | −$0.26 |
| Field-Tested | $0.45 | −$0.25 |
| Well-Worn | $0.57 | −$0.13 |
| Minimal Wear | $0.91 | +$0.21 |
| Factory New | $2.62 | +$1.92 |
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.