G&G 2500rd Auto Winding Box Mag for M4/M16/LMG Item Type_Survival Kit A speed loader is recommended

A speed loader is recommended for filling this magazine

All metal construction with plastic baseplate and feed lips

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

15 round magazine for PSG-1

A 20mm top rail traverses the upper receiver for attachment of any 20mm optic

G&G 2500rd Auto Winding Box Mag for M4/M16/LMG Item Type_Survival Kit A speed loader is recommendedThis 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