I am not disputing your experience at all, May be that’s what they are telling you. I know for a fact what I stated, they DO NOT X-ray packages, they DO NOT sniff them with dogs, or search them in anyway way shape or form. In order for them to do that they NEED A WARRANT. In order to get the warrant they need PC to place in the affidavit and so on. Is almost impossible to accomplish these tasks on regular Joe packages so the few PIs target criminal organizations that smuggle items thru the mail. They couldn’t care less about your ML barrel.