Bungie introduced the weapon crafting mechanic during the Witch Queen expansion in Destiny 2. This mechanic aimed to reduce the grind when farming the best god rolls for weapons. Although not all weapons were craftable, the ones which were, made it to the meta very soon.
This mechanic exists in Destiny 2 Lightfall as well. Bungie has changed multiple aspects, making the system more player friendly. To keep the mechanic alive, the developers introduced some new craftable weapons exclusive to the campaign.
Although many new weapons are introduced alongside the new campaign, only five can be crafted at the Enclave on Mars. The weapons are as follows:
You will have to complete five Deepsight Resonance extractions. Once the extractions are complete, you can craft these weapons in the Relic Engine at the Enclave on Mars. To complete Deepsight Resonance extractions, you don't need to defeat enemies with these weapons.
Instead, you can access the weapon customization page by inspecting the weapon and unlocking the pattern. This is one of the many changes Bungie introduced for weapon crafting mechanics in Destiny 2 Lightfall.
There's no specific area from where these red-border weapons can be found. Due to the lack of a specific method, it's rather hard to designate a process as a sure-shot way to procure red border weapons in the Destiny 2 Lightfall campaign.
However, since this is entirely RNG-dependent, there's a minor exploit that you can experiment with. This exploit involves maxing out their reputation with Nimbus, the destination vendor for Neomuna. Maxing out your reputation with him will reward you with Engrams, which only contain weapons from the Lightfall campaign. You can then claim these Engrams and unlock them.
Gaining max
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