So i was playing the nightfall and I beat it and at the very end some rocket launcher I haven't ever had drop before dropped called gjallahorn, I'm running out of room for my special weapons with my super good advice and thunder of Crota and I was going to dismantle this weapon ? But I didn't know if it was good ? I hear a lot of people talking about how you have to have it but I usually prefer to use no land beyond for any high level enemy's because of its damage out put ? Should I dismantle it or save it in my vault ?