Redeem this code in-game in the Market or at http://warframe.com/promocode : FN6B-8RML-MLH6-GM2N
Direct link https://www.warframe...-8RML-MLH6-GM2N
Its a free sniper rifle (which will generally come with a free weapons slot and a potato)
For any one who doesn't already know and is interested if you link an amazon prime account (free trial is fine) to a twitch account to get twitch prime and them link that to your warframe account you get Frost Prime, Soma Prime and Scindo Prime.
EDIT: And check out the amazon prime (free trial works)/twitch prime loot which will get you Frost prime and a really good rifle plus other stuff if you haven't already.
Edited by Eridan, 20 November 2017 - 01:15 pm.