Why should these be added?
These are a reward, a goal, a symbol of progression. Not purchasable with your AFK points, nor your many wins, they are a statement of a player's dedication to unrepentant slaughter of others with a favourite weapon above all others. No meagre 500 kills, nor 1,000 neither, to wield such weapons someone needs to Already See You Coming And Fear.
Tying in with, but not dependent on, @Saturnity's suggestion of Milestones: Gold weapon skins for a significant number of Kills with each vanilla weapon.
Now there's several pre-existing Gold skins for guns, along with Chrome skins for say a lesser number of kills (or since they're much more visible maybe more lol), but while serviceable all are rather dated and could be made better if any of our Devs/Staff/Players have the time and knowhow.
Here's an example:
Example: < link


Basic Gold tint over the base texture, I'd show the rest of the weapons but I'd be demoted because it just applies the gold over any existing textures

I would much prefer an actual Chrome-Gold, real shiny set, this is a statement of achievement after-all not a subtle thing, but this'd do if desired since a Gold skin is a Gold skin. The kills required for each gun would be dependent on usage, eg AK-47 would be Way higher than say M16, and Way Way higher than a Glock.
To do this I would strongly recommend a database search query of all kills made of the server and levelling the cost-in-kills versus kills-on-average with a minimum of 1,000 for say the standard TTT pistol up to like 30,000 for the Gun which currently claims the title of deadliest on the server. If this query ability does not currently exist then use your knowledge to make these awards for now and/or make the system because it'll be useful for tweaking metas later anyway.
Pros: Goals and progression, it's a Gold fucking skin and to earn it you've gotta earn it. But fr it's a time investment on the server and the silent smugness knowing that anyone who sees/specs you knows you are a force to be reckoned with (even if your aim and game-sense is absolute ass you earned it lmao).
Cons: Game wise this may promote specialisation to a degree, creating many 'metas' based on preferred guns rather than the gun that would actually be best for a situation, this however would jeopardise the player's success if they aren't worthy of the skin. Similarly VIPs would benefit by spawning with the gun they are working towards; since this does not affect their gameplay, this is only a cosmetic not p2w, and there would not be a points-cost by which their discount would advantage them their benefits are wholly befitting their purchase, not excessive.
Chrome Skins:
I can't find any on the workshop so use your imagination or nostalgia of cod and such like; fairly self explanatory, however since these would be more visible than Gold skins I am not sure whether these would be better as a further or lesser goal, especially since GMod lighting is fucky at the best of times.
Last edited: