When playing New Vegas, I usually keep a low-level weapon (9mm pistol, etc) handy for killing varmints, raiders, or any low level enemies to keep wear on my primary (expensive to repair) weapon down. I find that over the course of a playthrough, I get attatched to my varminter or primary (particularly sniper rifles) and I thought it would be a cool mod idea that if you killed say 100 or 200 enemies with a weapon, it would become a 'unique' that you could name and possibly assign an upgrade to. I sort of started trying to make this, but due to me personal circumstances, I don't have enough time to actually get good enough at scripting to try to implement this. With my (somewhat endeucated) best guess, the easiest way to do this would be to create a challenge for each weapon and to have the challenge reward be an item that lets you rename the weapon and add one or two mods to it. The problems I encountered (aside from not being good enough at scripting to pull this off) are: i) I couldn't think of a way to keep a kill tally for one specific weapon, so it might have to be a total of all kills with 9mm pistols for example, and not a total of all kills with this specific 9mm. ii) I couldn't think of a way to make sure the challenge reward to mod the weapon was only used on the challenge weapon. (e.g. you killed 200 enemies with a hunting rifle and used the challenge reward to make the sniper rifle you just found unique and now uber) iii) There may be a problem with adding modifications to weapons like the cowboy repeater, which already has 3 mods in-game. Still, this is something that I would like to see and if anyone here who's good at modding wants to take the idea and run with it, I can't wait to see the finished product.