(rifles, assault weapons, pistols) to dream of having a gun is symbolic of being armed with the word of God.
To have a gun pointed at you is symbolic of being under attack by spiritual enemies or people. Guns are also symbolic of the weapons people use against each other (curses, lies, mischief, slander, and insults) Ps. 10:7 ... Christian Dream Symbols
The gun in your dream could represent several different things, so please pay attention to the details and to the mood of the dream.
The gun could symbolize the male sex organ, aggression, harshness, and fear. This dream may have sexual connotations, or your unconscious mind may be telling you not to harbor your negative feelings but express them more freely before they become explosive. On the more positive side of things, the gun could simply represent your need to protect yourself either emotionally or physically or both.
If the gun in the dream is used to hurt or kill you or someone else, please consider your current difficulties, hostile feelings or serious arguments, which you may have within yourself or with others. See Also: Shooting, Blood... The Bedside Dream Dictionary
Whether you saw it, heard it, or used it, any type of gun featured in your dream forecasts an injustice, either to you or to someone in your close circle, which you will have to fight hard to overcome.
To dream of loading a gun is a strong caution against giving way to temper.
A dream of gunpowder indicates a sudden change of occupation for a man; for a woman, it means an unexpected change of residence.... The Complete Guide to Interpreting Your Dreams
Gunshots in dreams indicate that you must remain alert. You have to be cautious because unforeseen circumstances can alter your current life.
If in the dream you enjoy shooting, you will have good luck. If, however, you are frightened, the dream portend difficulties. Shooting up at the stars is, universally, an advantageous and promising dream.... The Big Dictionary of Dreams