Just recently did the Saber strike and lucky for me I got myself a scorch cannon. After playing with it seeing if it might do something cool if I shoot at stuff come across something weird. This can actually shoot through a door that only opens in the Promethean Code mission.
Skip to 0:22 if you don't want to see the previous stuff I did.
[spoiler]My original reddit post:
https://www.reddit.com/r/SearchfortheSleeper/comments/3ncv0q/scorch_cannon_could_possibly_open_a_door_in_saber/[/spoiler]
[spoiler]If you want to help search for the SS there is a reddit community which I primarily uploaded this video for.
Go to /r/searchforthesleeper to post your original clues and information that you've gathered for the SS, and help test other guardians theories.[/spoiler]
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I feel like this was just a glitch.