Doing some gun research, I came upon a word I never heard before, and obviously never used. The word is “Hoplophobia“.

Definition (noun) – An irrational, morbid fear of guns (coined by the late great Marine Lt. Col. Jeff Cooper, from the Greek “hoplites,” meaning weapon). May cause sweating, faintness, discomfort, rapid pulse, nausea, sleeplessness, and more, at the mere thought of guns. Hoplophobes are common and should never be involved in setting gun policies. One must point out hoplophobic behavior when noticed, as it is dangerous, whereas sufferers deserve pity and should seek treatment. When confronted, hoplophobes typically go into denial, a common characteristic of the affliction. Often helped by training, or by coaching at a range, a process known to psychiatry as “desensitization,” often useful in treating many phobias. Also: Hoplophobe, hoplophobic.

Use in a real example: “The person has hoplophobia and passed out at the mere sight of a gun.”