Bulgaria has maybe the most absurd legal conditions for weapon ownership and self defense in Europe. According to the current weapon regulation wall only three types of weapons exist: - Firearms (anything using explosion or combustion to launch solid projectile). Modern ones need permit. Self-made are illegal. Ones created before 01.01.1900 are unregulated. Replicas of weapons from before 01.01.1900 are also unregulated in case they are incapable of operating with smokeless gunpowder. Black gunpowder however is regulated as explosive, so firing such weapons/replicas is illegal if you lack proper permits. - Gas and blank guns (firearms that do not launch solid projectile /do not ask me/). No permit, no registration (aside from traders having to keep record of sales). - Pneumatics. The definition is "use gas pressure to launch pellet or BB (used term 'сачма' means both) from the inner side of a barrel" (blow guns, arrow shooters and so on do not fit here). No permit. Must be registered if muzzle energy is above 24 joule (traders have to record sales even if below). Aside of this there are regulations on explosives and there is also a ratified international treaty that classifies high velocity mass drivers (anything, capable of accelerating object with mass higher than 0.5g to speed higher than 1.5km/s) and high power lasers (i think it was over 2KW/mm2) as "usable as weapons" and forbids private individuals to own such devices. For hunting and fishing there is explicit ban only on crossbows, but to get your hunting/fishing permit you need to get different ritual equipment (explicitly specified types of firearms/gear), pass proper initiations (prove you know how to use the ritual equipment) and follow the hunting rituals (that cover all details of the ritual equipment usage process, and leave no place for heresy). Everything else is not legally considered weapon and is not regulated. There are even no legal terms to describe the concept of difference between melee and ranged weapons. By the letter of wall you can create, own and carry anything that is not amongst what was listed above. Of cause if police finds that you walk in a middle of a city equipped like medieval mercenary they may (or may not) try to confiscate something (depends on place, situation, age and appearance), and with sufficient motivation will find plenty of ways to go around the lack of direct legal base. Usually places and situations that may lead to this are predictable and avoidable, but even in case you draw attention there can be no legal consequences. Still it is advisable to carry things that are either classified as tools (my folding knife is Walter Tac Tool for example) or considered to be self-defense oriented (pepper spray, zap gun..). Everything else must be considered expendable, so using your favorite, or hard to make/expensive slingshot for everyday carry is not recommended. I for example carry a weaved short sling (no paracord, not good for sling) and theraband monotube with pouch (BTW, nice for launching 15-20 .177 BB's) - both cost much less than their ammo (each sling bullet is 90g lead, several pepper paintballs for the tube...). The catch is that while you can own and carry almost any weapon there is simply no such thing as self defense in Bulgaria. Theoretically there is something called "reasonable self defense" in the wall, but to have even a slim chance to plead it one must be Kung-Fu master, capable of neutralizing any number of enemies without causing any noticeable physical or psychical (in case the offenders are stray dogs) damage. Practically there are only two types of self defense: illegal and translegal (involving oligarchs, high ranking government and force officials, gipsies, pseudo-Syrian immigrants and citizens of certain foreign counties). As result of this caring either legal or illegal firearm is completely meaningless (if you are not translegal) - in both cases using it for self defense will only increase your sentence, adding either abuse of permit or illegal ownership (still with illegal one you have chance to pass as criminal and get probation instead of jail). Better stick to the wide choice of "non-weapons".