Add to ORKGThe paper deals with the influence of the current security situation in Europe, numbers of weapons of category D in the Czech Republic and with perception of security in the Czech Republic by citizens. Due to the absence of official statistics relating to weapons of category D, the development is derived from the development of firearms in category B and firearms licenses of group E. The effect of necessity to own a firearm by the citizens for the purpose of their necessary self-defence at the utmost reflects an increase in the number of weapons of category B and firearms licenses of category E, thanks to which then statistics of these categories of weapons and firearms licenses can be used to express the impact of security incidents on the...