If all the gear you are purchasing is full price then you may need to order from another device, browser, and/or network as there could be a firewall in place preventing the discount from going through.
Keep in mind, discounts will not apply to Tribe subscriptions, items already on sale, or bundles.
If you continue to have issues checking out after trying those steps, please let us know at team@goruck.com and we will be more than happy to help!