M4A4 | Mainframe

The M4A4 | Mainframe is available in the following wear conditions: Factory New, Minimal Wear, Field-Tested, Well-Worn, Battle-Scarred. Each wear corresponds to a float value range: Factory New (0.00–0.07), Minimal Wear (0.07–0.15), Field-Tested (0.15–0.38), Well-Worn (0.38–0.45), Battle-Scarred (0.45–1.00).

The M4A4 | Mainframe can be obtained from the following CS2 weapon case(s): London 2018 Nuke Souvenir Package, Katowice 2019 Nuke Souvenir Package, Berlin 2019 Nuke Souvenir Package, Stockholm 2021 Nuke Souvenir Package, Antwerp 2022 Nuke Souvenir Package, Rio 2022 Nuke Souvenir Package, Paris 2023 Nuke Souvenir Package, Copenhagen 2024 Nuke Souvenir Package, Shanghai 2024 Nuke Souvenir Package, Austin 2025 Nuke Souvenir Package, Budapest 2025 Nuke Souvenir Package. Each case requires one case item and one $2.49 key from the Steam Marketplace. It is also part of the The 2018 Nuke Collection.

The M4A4 | Mainframe is Industrial Grade rarity — a common tier found in collection drops. Rarity tiers in CS2 from common to rarest: Consumer Grade, Industrial Grade, Mil-Spec, Restricted, Classified, Covert, Extraordinary.