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

The piston features 10 heat treated steel teeth in addition to the piston's embedded polycarbonated teeth

Sports great looking ghost flip-up sights that are fully removable from the 20mm top rail

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