CYMA – 140rnd Mid-Cap Magazine - Black is constructed from polymer these magazines are lightweight, but durable and designed to last. The magazine is designed to hold 140 BB's and is fed using a spring powered system meaning that no winding is required, and there is no more rattle. These magazines are built to fit most standard Airsoft AEG feeding weapons. These are the perfect choice to expand your collection of Airsoft Magazines. With a waffle print pattern the magazine has excellent grip especially in rain and other harsh weather and terrain. The magazine is designed for CYMA / Tokyo Marui type magazine wells but may fit other manufacturers.