1, you cannot buy it. 2, RNG has to bless you with it 3, #2 makes it as rare as an exotic 4, pulse rifles are the most powerful this current update 5, who doesn't want to kill in 2 burts? 6, it's a Pulse rifle 7, not everyone will have it or get to try it 8, it's a legendary that matches and out classes the best PRs 9, try to get one! bet you cant. if you do then I probably won't