Just got back to back rare case drops. I got a weapon case 2 last week and an original weapon case this week. I opened the weapon case 2 and got some purple dualies but Im probably going to open this when Im drinking on call with my mates.
Each weapon case is ~0.03% so its ~0.000009% chance for back to back. So odds are Ive used up all my luck but oh well its for the hobby.