Bungie has been hard at work investigating reports of issues downloading Destiny's latest update, but that doesn't mean that the Gunsmith is too busy to test out new weapons. Bungie is looking to bring the biggest arsenal of weapons that Guardians have ever seen in The Taken King, so they definitely need a field test.
According to Bungie, Guardians should report to the Tower at 1PM EDT/10AM PDT to get a good look at what's coming in the expansion.
Field testing of new weapons from the Gunsmith begins in one hour. Report to Banshee-44 in the Tower at 10AM Pacific.
— Bungie (@Bungie) September 9, 2015
Hopefully the update has managed to download to your console. Good luck!