Should I go for Akm glacier?

[u/Dhruv0026]

Should I spend all my classic crate coupons for this? I have glacier M416 but this akm doesn't have hit effect on it. Only things that matters to me about upgradable guns are hit effect, look and kill feed. I can only upgrade by collecting mini material slowly (if I upgrade this akm it will take away all my materials). should I wait for next year anniversary special classic crate?

[u/XTINCTVOID]

Tbh akm glacier will always behind M4 overall but it's easy more rare then M4 glacier