is an unofficial, open-source server-side and client-side patch created by the modding group XLabs (formerly part of the ReKT community, later forked and maintained by a collective of dedicated programmers).
: The cod4x_client_21_1.zip file is usually found on the CoD4x official forums or GitHub. call of duty 4 modern warfare update 21.1
To get Update 21.1, you download the CoD4x client separately and point it to your existing CoD4 installation. is an unofficial
While there is no official "Update 21.1" for the original Call of Duty 4: Modern Warfare call of duty 4 modern warfare update 21.1