Which Discontinued Weapon Do You Miss Most?

　
This topic talks about weapons NO LONGER available.
It can be a seasonal ZP crate weapon, or a discontinued coupon exchange weapon.
Things like regular Axe or AK47 camo are not included. They are still available in another way.

The discontinued weapon I miss most is Axe rose.
If I don't have M4 spring, I should miss it most. Fortunately I have one.
I also miss Jack Hammer halloween, Gatling Gun halloween and golden Gatling Gun.

How about you?