I'm a Day 1 player in Destiny, so I've been there for all of the events and DLC drops. Because of this, I've gotten some sweet loot in the past year and a half. When The Taken King dropped, I had to clear some space in my vault and delete my Y1 guns (shortly after, Bungie announced they were doubling the vault space, so perfect timing). One particular gun I scrapped was the Y-09 Longbow Synthesis, a beautiful Legendary sniper with an impact that rivals the 1000-Yard Stare, with a god roll. Is there any way I can get any Year 1 weapons back? I've tried running Legacy Strikes, but I've only gotten rare Y2 gear. I've even tried lowering my Light level to sub-170, but still no luck.
TL;DR: Accidentally dismantled some Year 1 Legendary weapons, don't know how to/if I can reobtain them