UMP-45 | Mudder

The UMP-45 | Mudder 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 UMP-45 | Mudder can be obtained from the following CS2 weapon case(s): London 2018 Inferno Souvenir Package, Katowice 2019 Inferno Souvenir Package, Berlin 2019 Inferno Souvenir Package, Stockholm 2021 Inferno Souvenir Package, Antwerp 2022 Inferno Souvenir Package, Rio 2022 Inferno Souvenir Package, Paris 2023 Inferno Souvenir Package, Copenhagen 2024 Inferno Souvenir Package, Shanghai 2024 Inferno Souvenir Package, Austin 2025 Inferno Souvenir Package, Budapest 2025 Inferno 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 Inferno Collection.

The UMP-45 | Mudder is Consumer Grade rarity — the most common tier, typically dropping at ~79.9% from weapon cases. Rarity tiers in CS2 from common to rarest: Consumer Grade, Industrial Grade, Mil-Spec, Restricted, Classified, Covert, Extraordinary.