Will leaving an a/c compressor off my car for 5 or more months ruin the whole a/c system?

When ac systems have been open for a while it is advised to replace the items you listed. Moisture and trash enters the system. Most new compressors will not give you a warranty if you don't replace all the items listed. I advise to replace them to avoid future issues.

I probably should have said this before but I was already going to replace those three parts but the the shop that I talked to said that I may have to replace more than that because my system is contaminated from being open for so long. Just trying to see if anyone has had a similar problem and had to replace more or was ok with just those three parts. Thank you though for your answer : )

K, Never buy a car with parts missing/removed even if it was for free most of the time the money you thought you "saved" on the front end you end up putting out on the back end and you are inheriting someone else's headaches.