Need help regarding ZP crates.

I'm buying 50 ZP crates in sets of ten. I have already boughten:

m4-custom(10)
awm red dragon(10)
Galil (10)

^^Haven't opened any yet.

Any other 2 crates that you think that's worth buying 10 crates for?

Also, when the time comes, please wish me good luck.

-Logic.

m4 spring isn't there anymore..