Dude, I rolled so many weapons I ended up with 0, that's right 0 weapon parts the week before weapon 2.0 patch dropped. I've upgraded so many weapons since TTK was launched, including 3 characters, pve, pvp and raid weapons. I've even used a few to level up faction (although not too many) and I still have over 750 weapon parts across my characters. Learn to manage your materials.