He has a dagger and a revolver – is there any zakaah on them?
Question

                My father has a dagger and a licensed revolver. I want to ask: is there any zakaah due on them?.
Praise be to Allah.No zakaah is 
    required of a person for what he owns of weapons, animals, clothing and the 
    like, unless it is for trade. The evidence for that is the words of the 
    Prophet  (peace and blessings of Allaah be upon him): “No zakaah is due 
    from the Muslim for his slave or his horse.” Narrated by Muslim (982). 
Al-Nawawi 
    (may Allaah have mercy on him) said: This hadeeth is the basis of the 
    principle that no zakaah is due on one’s own property, and no zakaah is due 
    on horses and slaves if they are not for trade. End quote from Sharh 
    Muslim. 
One's own 
    wealth means that which a person keeps to make use of and benefit from, not 
    for purposes of trade. On this basis, no zakaah is due on the dagger and 
    revolver, unless they are prepared for sale, in which case zakaah is due on 
    them. See also the answer to question no. 
    65515 for information on how to 
    pay zakaah on trade goods. 
It should be 
    noted that the dagger may be made of silver or plated with gold. If the gold 
    or silver in it reaches the nisaab (minimum threshold) then zakaah is due on 
    it; or if it is less than the nisaab but the owner has other gold or silver 
    that reaches the nisaab when put together with it, then zakaah is also due 
    on it. 
But if the 
    gold or silver in it is less than the nisaab and the owner has no other gold 
    or silver, then no zakaah is due on it. 
The scholars 
    of the Standing Committee were asked: is a personal weapon such as a rifle, 
    revolver or sword subject to zakaah, and how should it be paid? 
They 
    replied: 
No zakaah is 
    due on that because it is not prepared for trade. But if there is any gold 
    on the sword etc that reaches the nisaab by itself or when added to other 
    gold that he owns, then he must pay zakaah, according to the more correct of 
    the two scholarly opinions, as is the case with jewellery. End quote. 
Fataawa 
    al-Lajnah al-Daa’imah (9/276) 
And Allaah 
    knows best.