I don't know how many weapons there are to collect, but I got But Not Forgotten on Saturday (if I'm not mistaken), and Saladin's Vigil last night. Sniper dropped at 368, Vigil dropped at 365. This was after getting mostly class items. I wish they would drop at a higher light, like 2-3, instead of 1 point higher like they have been. But yes, I've been receiving more class items than weapons, though I wish the Forge armor dropped more often (I've only received the gauntlets and helmet after I don't know how many completions).