M4A4 | Mainframe appeared in Counter-Strike: Global Offensive on September 3, 2018. It belongs to The 2018 Nuke Collection that was introduced to the shooter in the “FACEIT 2018 – Ways to Watch” update in time for the start of the London Major.

The gun’s barrel, along with the receiver, is covered with a pattern, simulating a printed circuit board. The other parts of the firearm have the appearance of the vanilla M4A4.

The pattern index determines the arrangement of design elements on the surface of the firearm. This weapon finish does not have valuable pattern versions.

Float Value of the item can vary between 0.00 and 0.50, allowing the skin to be obtainable in any exterior quality category. As the weapon’s quality deteriorates, the gun slightly darkens and noticeably wears down. At high float values, a large amount of paint gets erased from the barrel, and the pattern on the receiver becomes corrupted.

M4A4 | Mainframe is categorized as the “Industrial Grade” rarity and is available in a souvenir version. This weapon finish is not popular among CS2 players.