The Criminal Code of the Republic of Lithuania (CC) entered into force on 1 May 2003. A notion of a firearm is referred to in the new Criminal Code establishing criminal liability aggravating circumstances, qualifying such criminal acts as robbery, contraband, being a party to the offence, seizure of aircraft. Furthermore, the notion of a firearm is also implied in the Articles establishing liability for illegal disposal of firearms, their seizure as well as laying down the violation of rules of firearms' keeping. There are presented some elucidations concerning the notions in the Criminal Code of the Re- public of Lithuania; however, the elucidation of the notion of a firearm is not provided in the Code. Naturally, the Lithuanian Criminal ...