MK Modellbau is an online retailer serving model-building enthusiasts, with a focus on components and accessories for scale models. Its range includes dedicated 1:16 model accessories, alongside products for other scales, and the shop organizes much of its specialist selection by vehicle, historical period, and country. The extensive 1:16 catalogue covers World War I and II subjects, including German, Russian, and American vehicles, as well as Bundeswehr and modern American models. Categories include weapons and equipment, vehicle accessories and tools, and parts for specific tanks and other vehicles.

For workshop and general modelling needs, MK Modellbau also offers bearings and bearing sets, turning and milling accessories, drills and threading tools, and electrical supplies such as switches, heat-shrink tubing, cables, and cable ties. Its fastener selection includes screws, nuts, washers, rings, and grub screws. The store highlights new arrivals and provides online shopping features including a customer account, guest checkout, a wish list, and a shopping cart.