You can obtain one of the following items. Duration will random 1-30 Day:

Cheytac M200 PBST / Cheytac M200 PBNC 2016 / Cheytac M200 Halloween2021 / Cheytac M200 Cupid

Cheytac M200 Cursed Valentine / Cheytac M200 Summer 2021 / Cheytac M200 Super Star / Cheytac M200 GunZeeD

Cheytac M200 GW2018 / Cheytac M200 Shatter Ultimate