As far as I know the free ones are unranked. For everyone to be equal you can use the force weapon and diable suit perks .cfg commands, full list below.
Not sure how it works with the free servers? Read the readme?
It's possible for you to set up a custom level rotation file, or change CVARs directly. Changing any of the following will result in the match being UNRANKED. Users will be informed via in-game UI.
g_timelimit
g_scoreLimit
g_minplayerlimit
g_autoReviveTime
g_roundlimit
g_numLives
g_maxHealthMultiplier
g_mpRegenerationRate
g_friendlyfireratio
hud_radarTypeMP
g_mpHeadshotsOnly
g_allowCustomLoadouts
g_allowSuitPerks
g_allowTeamPerks
hud_dogtagsEnable
g_allowFatalityBonus
g_modevarivar_proHud
g_modevarivar_disableNanosuit
g_modevarivar_disableKillCam
g_modevarivar_disableSpectatorCam
g_allowExplosives
g_forceWeapon