I have been messing with the mod tools and been adding some stuff, currently testing in instant action.
So among other things i have made Heavy PPC’s, i have the date they are introduced, and the number for its salvage. Not totally sure what that means but it looks like the higher it is the more rare it is.

Now if the year requirement is met, where will i see this. For end of mission salvage, is it somewhat random or is the items in the list tied directly to the mechs in the mission meaning that if i do t modify a mech to hold the heavy ppc it wont be available?
Or will it appear in stores?
How about those random boxes of stuff with a blue sky beam that Ryana always points out that you are close to. Can a new item or a compact heatsink appear in there?