How to unlock LACHMANN 556 on MW2 and WARZONE (MW2 LACHMANN 556)

LACHMANN 556 on warzone. How to Unlock the LACHMANN 556 MW2 LACHMANN 556 could be amazing for warzone and mw2 multiplayer, i really suggest getting it unlocked. It could be the warzone meta, or even the best ar warzone.
Best ar on mw2 is the LACHMANN 556.

mw2,modern warfare 2,lachmann 556,mw2 lachmann 556,lachmann 556 mw2,mw2 lachmann 556 class,mw2 lachmann 556 loadout,mw2 best lachmann 556 class,mw2 best lachmann 556 loadout,best lachmann 556 class mw2,best lachmann 556 class setup mw2,lachmann 556 class,lachmann 556 loadout,lachmann 556 loadout mw2,lachmann 556 class mw2,best lachmann 556 class,best lachmann 556 loadout mw2,best lachmann 556 tunes mw2,mw2 lachmann 556 tune build,mw2 lachmann 556 tuning,

Kastov 74u,kastov 74u mw2,kastov 74u tuning,mw2 tuning,mw2 kastov 74u,best kastov 74u,kastov 74u class,best kastov 74u class setup mw2,mw2 kastov 74u class,best kastov 74u class mw2,kastov 74u class mw2,p4wny,p4wnyhof,p4wnyhof warzone,p4wnyhof mw2,p4wnyhof warzone 2,p4wnyhof modern warfare 2,gun doctor,gun doctor warzone,mw2 meta,warzone 2 meta,meta mw2,kastov 74u class setup,mw2 best kastov 74u loadout,mw2 kastov 74u class setup,modern warfare 2

modern warfare 2,modern warfare 2 gameplay,modern warfare,warzone 2,call of duty,call of duty modern warfare 2,modern warfare ii,modern warfare 2 beta gameplay,warzone 2.0,mw2 multiplayer gameplay,modern warfare 2 multiplayer gameplay,modern warfare 2 multiplayer,mw2 gameplay,warzone 2 gameplay,mw2 slide cancel,how to slide cancel,cod modern warfare 2,modern warfare 2 beta,slide cancel mw2,modern warfare ii gameplay,how to slide cancel mw2,mw2 movement