It's all up to you recruit, sometimes you get lucky and sometimes you don't. I got leveled and got a
4,000GP Bonus and spent all of it on one Supply Case, remaining 300 - + (I don't know). What did I get? AUG A1 Black, 1-Day. It was ok, I wasn't that pissed.
Then months later when I went to CSM 2, bought one supply case. What did I get? AK-47, One Day. Oh you have no idea how much I was pissed
Now, not telling you to do this, there is a Supply Case glitch for the AK-103. I did it once, got it for 90 Days. Never did it again =P.
But if you're going to do GP cases, note you WILL get a SHITTY weapon for a SHITTY amount of days
. That is unless you do the AK-103 case with the glitch, then you're guarenteed a AK-103 for at least one week.
But I'm more of a fan of NX Supply Cases, not all of them, but ones where it has only like 4-10 possible items. I mean I bought a SG-N supply case, got Spas 12 Gold for one day first try, then I was on a roll, bought L96-N and got Super Magnum for one day. Then I wisely got a G36 Valk and CQB both for a day each. But I activated the CQB late
So I'd say NX Supply Cases > GP Supply Cases
Gift me if I helped ;D Krishna21