FPS Drop in CODM

Hello To everyone, i have a problem with the FPS in CODM that even in low graphics i have a huge amount of FPS drop and i really don't know why ? like from 120 to 30 FPS and its really annoying specially when your playing with a mythic character or a mythic gun, even with normal skins i have some FPS issues....PLEASE HELP. or just patch it somehow idk if i have to update gameloop or not but i just downloaded the Arena breakdown and then followed the guide for playing CODM on it but there is so much FPS drop.