M4A1-S | Welcome to the Jungle appeared in Counter-Strike: Global Offensive on December 3, 2020. It belongs to The Ancient Collection, containing 19 themed weapon finishes from the same-named map. This collection was introduced to the shooter with Operation Broken Fang.

The carbine’s surface features a yellow snake, presumably hanging from a branch. The reptile's tail wraps around the shoulder stock. The background for the image is the multicolored jungle. Various pictograms are seen on many parts of the gun.

Float Value of the item can vary between 0.00 and 1.00, allowing it to be obtainable in any exterior quality category. The weapon darkens and loses paint as it wears. At high float values, the assault rifle noticeably fades, and some abrasions on its surface (mostly on the shoulder stock and magazine) resemble snake scales.

M4A1-S | Welcome to the Jungle belongs to the “Covert” rarity grade and is obtainable in a souvenir variant. The skin is popular among CS2 players.