CYMA – M4/16/15 450rnd Hi-Cap Magazine - Black is constructed from polymer these magazines are lightweight, but durable and designed to last. The magazine is designed to hold 450 BB's and features a large sliding feed window, allowing you to pour BB into the magazine directly from the bottle. 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.