G&G 2500rd Auto Winding Box Mag for M4/M16/LMG Item Type_Survival Kit With a loaded magazine inserted

With a loaded magazine inserted

reducing stress on the front of the gearbox

A speed loader is recommended for filling this magazine

all available here

G&G 2500rd Auto Winding Box Mag for M4/M16/LMG Item Type_Survival Kit With a loaded magazine insertedThis 2500rd Box magazine works with most brands of M4 M16. Constructed from a high density, injection molded polymer and powered by a reinforced internal gear set. Designed to keep up with the most demanding rates of fire. A toggle switch activates the auto winding feature once inserted into the magwell of the M4. A handy loading door is located on the top of the magazine, where dummy rounds can also be placed for display. Powered by 2x CR123a