Hardline

Effect

Reduces the kills needed for each killstreak by one.

Key facts

Call of Duty: Modern Warfare (2019) — Multiplayer ArsenalObserved in a community sample
DiamondLobby · accessed 6 Aug 2026
Multiplayer weapons, perks, killstreaks, field upgrades, maps and modes for the 2019 Modern Warfare, compiled from community references.
Full List of Killstreaks in Call of Duty Modern Warfare (2019)Observed in a community sample
GamesAtlas · accessed 6 Aug 2026
Killstreak names, required kills and map list cross-checked against the dedicated GamesAtlas Modern Warfare killstreak and map guides.
Call of Duty: Modern Warfare Perks and Field UpgradesObserved in a community sample
PCGamesN · accessed 6 Aug 2026
Perk slot assignments and field upgrades verified against the PCGamesN Modern Warfare perks and field-upgrades guides.