What set does this bag belong to? Black, grey, orange, and blue rubber band
Based on the colors in the bag, the potential date code of 12S7 (you wrote 127S but I assume that is a transposition error in your post), and the fact that there is a box with blue rubber bands in it (box number 6049725) I am going out on a limb and suggest this is set 75102 Poe Dameron’s X-wing Fighter from 2015. The seal code points to a 2017 production date which is possible, as this set was still being sold all the way up to early 2018. It has 5 bags (so having a bag marked 5 fits) and the 5th bag does contain both rubber bands as well as black, grey and orange pieces.