About the M4A1-S | Basilisk
M4A1-S | Basilisk is a Restricted skin that drops from one of the 42 CS2 weapon cases, the Operation Vanguard Weapon Case.
Valve released the Operation Vanguard Weapon Case on 11 November 2014.
Each open has a 3.9950% chance (about 1 in 25) of pulling it, as one of 4 Restricted finishes. One in ten of those drops is StatTrak.
It sits in tier 2 of 5 (Mil-Spec to Rare Special) and ranks #70 of 79 finishes in the Operation Vanguard Weapon Case by top-wear Steam price.
Its Steam price runs from $9.43 to $35.66 across wears, against $8.98 to open the Operation Vanguard Weapon Case (case plus $2.50 key), so every wear is worth more than one open.
Cases that drop the M4A1-S | Basilisk
Chance per open = Valve's Restricted odds divided by the number of Restricted finishes in that case. StatTrak versions drop 10% of the time. Open any of these free in the simulator: demo, nothing won. 18+.
| Case | Chance per open | About 1 in | StatTrak | Cost / open | Released |
|---|---|---|---|---|---|
| Operation Vanguard Weapon Case1 of 4 Restricted | 3.9950% | 25 | 0.39950% | $8.98 | 11 November 2014 |
M4A1-S | Basilisk wears, float ranges and prices
Steam market 7-day average prices from 2026-10-03. Our item data has no per-skin float cap, so the standard 0.00 to 1.00 scale and the five wear bands are shown. A wear without a price had no recent sales or does not exist for this skin.
| Wear | Float range | Price | StatTrak |
|---|---|---|---|
| Factory New | 0.00 to 0.07 | $35.66 | $50.72 |
| Minimal Wear | 0.07 to 0.15 | $13.41 | $34.51 |
| Field-Tested | 0.15 to 0.38 | $9.69 | $23.91 |
| Well-Worn | 0.38 to 0.45 | $10.65 | $25.81 |
| Battle-Scarred | 0.45 to 1.00 | $9.43 | $22.61 |
M4A1-S | Basilisk FAQ
What are the odds of getting the M4A1-S | Basilisk?
3.9950% per Operation Vanguard Weapon Case open (1 in 25). That is Valve's 15.98% Restricted chance split evenly across the finishes in that tier. A StatTrak copy is one tenth of that, 0.39950% at best.
Which CS2 cases drop the M4A1-S | Basilisk?
Only the Operation Vanguard Weapon Case. The cheapest to open is the Operation Vanguard Weapon Case at $8.98 including the key.
How much is the M4A1-S | Basilisk worth?
Factory New $35.66, Minimal Wear $13.41, Field-Tested $9.69, Well-Worn $10.65, Battle-Scarred $9.43 on the Steam market (7-day average, 2026-10-03). StatTrak sells for $22.61 to $50.72.
Other Restricted finishes in the Operation Vanguard Weapon Case
All CS2 skins by rarity · Open the Operation Vanguard Weapon Case in the simulator (demo, nothing won, 18+) · How CS2 case odds work
This is a free simulator for entertainment: a demo, nothing is won and no money is used. Odds are Valve's published odds; wear and Doppler phase splits are estimated models, not Valve figures. Item values are indicative Steam market prices. Counter-Strike 2 and its item images are property of Valve Corporation. CaseBattles is not affiliated with or endorsed by Valve. 18+ only. Responsible gaming.