You’re playing the short version then. If you do it on normal you get a chest at each boss and two on the last boss. So that’s 6 weapons, plus the extra drops that occur during rounds which is usually 2-3 and then cashing in your tokens for a couple more. On a normal run I get about 10-11 weapons. I feel bad for players with bad RNG but the drop rates are the same for everyone I know. I get shiny drops every day but they’re obviously rare.