So I'm back online playing ME3 multi-player and I've earned more than 3 millions in credits. As I redeem my credits in the store, purely on Premium Spectre packs and Arsenal packs, I cannot seem to get ANY upgrades on my existing weapons nor can I get the Particle rifle. What's up with that? Are upgrades and other weapons just simply not available anymore? All I get is level 4 gear and ammo. Any suggestions or thoughts? Or is this just bad luck?