In order to maintain the required level of maintenance quality of the VHS-D2 / K2 rifle, it is necessary, first of all, to know its purpose and tactical and technical characteristics. In this paper, the function and operation of the assault rifle and maintenance at all levels are elaborated. To begin with, before each maintenance, every user of the rifle must know how to disassemble and assemble it. To be always ready for use, rifles must be regularly maintained, properly stored and handled properly. It is also important to know the delays and how to eliminate them, because they can lead to serious failures. Maintenance is carried out through inspections, user maintenance, workshop maintenance (light overhaul) and all the way to repairs on the second, third and fourth level of maintenance. Then, after all the work on the rifle, it is important to conduct a final inspection, and if necessary, test shooting, which after the work and repairs check the proper function and completeness of the weapon.