K180 has no repair shop?
 

I've check the repair shop locations and I did not find the repair option for K180 for each of them. Unless I missed one, there is no repair location for the K180. Including the shop where it's sold at. If K180 was meant to stay perfect shape, I find that awkward considering it's a normal gun, unlike Bow(stays rusty), Bunny Launcher, Water Weapons, etc.

It is probably at a different shop, considering repair shops only have 6 slots and theres 7 guns, try look at the house 26 repair shop, or the ammo mart repair place

I've looked. Every possible gun shop that I know. Including house 26 and ammo repair place. (Ammo shop has no empty slots) I'm pretty sure the people who bought the K180 might find their gun in good shape. If that's true, the gun needs a repair shop soon. Just like what happened to the M1 Carbine.