Cleaning a gun in a dream indicates good things and innovations to be experienced. It means that new developments will occur in the life of the person who sees that he is cleaning a gun in his dream. This can be an innovation related to professional life, it can be an innovation related to private life. It is the harbinger of new beginnings.
It signifies that a thought that has been put into the background and given up is to look warm again and to lean on it. It is a sign of being courageous again and this time being more courageous and determined to put into effect a plan that the person has attempted before but was later discouraged.