Abstract: A magazine for a firearm having a cylindrical housing with rear and front covers and with a smooth inner surface is provided. A hollow cylinder rigidly secured to the rear cover is arranged inside the housing. A helix is formed on the outer surface of the cylinder. A separator adapted for rotation is positioned inside the housing between the housing inner surface and the helix. Longitudinal grooves are formed on the separator. A cartridge remover is secured on the rear end of the cylinder. A spring is arranged inside the cylinder. One end of the spring is rigidly connected to the rear cover, the other to the front cover. A filler is secured in the upper rear part of the housing, and a feeder is arranged in the longitudinal grooves of the separator. A casing with a protrusion for securing the magazine on the firearm is secured to the front part of the housing.