I always clean my pistol after going to the range but if I don't get back to the range for several months, should I clean the gun anyway? Is there a standard interval for cleaning?
I thought that you were talking about a pistol....
Yes. The thin film of gun oil that makes the action work so smooth will turn to gum after a period of time. Some semi-auto pistols are sensitive to this. Clean it out and re-oil now and then. Also, rust will form under the best of circumstances if a firearm is left to sit.