Introduction This rehabilitation program is designed for those who committed gun crimes and sentenced to term more than 5 years. The methodology of program development and realization is based on the individual approach to changing and reforming criminal behavior and deals with the implementation of individual stages of change. Each stage presupposes different facilitation mechanisms, activities, and tasks for the prisoners. The realization of the program in the view of reforming those who committed gun crimes is charged with the prison’s administration including psychological services, staff, social penal workers, and various volunteers. The individual stages of gun offenders’ change include the following psychological rehabilitation, work activities, and improving normal social communication in case of different forms of sociopathy, engaging a person in amateur activities, cultural and moral development, and the preparation for social inclusion after the termination of imprisonment. All these stages should be realized coherently with the efforts of all stakeholders participating in the program realization. As it can be easily seen the individual stages of change are well-differentiated on a temporal basis and serves the goals that the penal system must pursue – improving and changing offenders if possible and making all necessary efforts to make them full-fledged members of society. Psychological activities and rehabilitation From the first days of gun offenders’ detention psychological services should take necessary steps to organize comprehensive psychological work with prisoners. The psychological specialists are required to design specialized programs addressing the issues connected with gun offenders. It is also necessary that they work with these people on an individual and permanent basis. It is recommended that giving psychological services was a necessary activity for all gun offenders no less than 2 times a week following the first months of detention and on an individually tailored timetable in the course of imprisonment. The psychological specialists are required to detect and analyze the general characteristics of each offender’s personality and develop specific programs for each of them. Even though some offenders are not reluctant to participate in psychological training, it is a well-documented fact that the majority of them have a positive attitude to psychological services. It should be remembered that psychological work should be very accurate and careful not to hurt offenders psychologically and to pursue its goals gradually and avoiding banal moralizing. Among the activities proposed for use in this stage of individual change are various psychological exercises aimed to define offenders’ inclinations and stereotypes, his temperament and other psychological variables, conversations on various remote topics, and thematically structured exercises. The psychological stage of individual change should also take into consideration the specifics of the crime committed and try to address indirectly psychological issues connected with this type of crime. It should be remembered though that the shaky frontier of traumatic effect shouldn’t be transgressed. It is important to note that the majority (30%) of gun crimes are violent offenses again