MODELIST BG is a Bulgarian online forum and community for people interested in building, operating, and discussing scale and radio-controlled models. Its member discussions span aviation, cars, boats, electronics, and the practical skills involved in model making. Aviation sections cover airplanes, helicopters, multicopters, rockets, gliders, and related equipment such as autopilots, telemetry, FPV, and aerial video systems. Automotive topics include off-road and on-road vehicles, as well as model trains, tractors, tanks, and other land-based models. The marine area features display and radio-controlled boats and ships, alongside submarines and amphibious craft.

The forum also provides spaces for model-building techniques, radio transmitters and receivers, batteries, speed controllers, chargers, servos, and other electronics. Members can share plans, books, and magazines, ask questions, take part in polls, and find information about events, competitions, meetings, and training courses. A classified section supports private buying, selling, and exchanges, while a separate area lists online hobby retailers. MODELIST BG serves as a place to exchange advice, showcase projects, and connect with fellow modelers in Bulgaria.