In case people don't know, there are 50 weapons in the game, 26 are obtainable per gamertag, via store, missions and chests. You can create other tags and hope they get other weeapons, but its a lot of work
There's also a way to duplicate weapons, requires either 2 controllers or another player over live:
- Have player 1 gift a weapon or weapons to player 2.
- Player 2 then goes to the sanctuary and REJECTS the gifts.
- Player 2 then leaves the game.
- Player 2 returns to the game.
If done correctly, both players will have the weapon, in a gift box.
I'll update when I get on to see which weapons I have.