This paper deals with the topic of modelling props for video games. The theoretical side of the paper is based on explaining 3D space and the main elements of modelling. Also, the focus is on optimizing 3D models and operation of game engines. Paper is based on 3D modelling in „Blender“, software for 3D modelling, therefor the theoretical part describes the software interface and the most important tools. Since this is a topic that does not have a fully understandable terminology in the Croatian language, the terms that will be used throughout the practical part of the paper will be clarified in the theoretical part. The practical part of the paper is based on the creation of a weapon model within the computer program for 3D modelling “Blender” with the help of the tools and principles of modelling described in the theoretical part of the paper. Practical part of the paper also briefly shows the texturing process of the model.