Source: The Great Interpretation of Dreams (Ibn Sirin)
(By analogy with a weapon) A pistol in a dream indicates power, protection, and strength. Carrying it indicates gaining power or a position. Firing it indicates decisive speech or a dispute.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
(By analogy) A pistol indicates a man of might and power. It may indicate a male child.
Source: Signs in the Science of Expressions (Ibn Shaheen)
(By analogy) A pistol is interpreted as power and victory. Whoever sees himself carrying one will gain power and victory.