M4 STW/PTW 120 ROUND MIDCAP USE a marking matrix which is

a marking matrix which is implemented at the bottom of the baseplate for magazine identification use

AluminumColour: Matte Black

and large in black and clear colors

Mid-cap magazine with clear window displaying dummy red shells

BLUE Laser

M4 STW/PTW 120 ROUND MIDCAP USE a marking matrix which isA&K M4 STW PTW 120 Round Midcap Airsoft Magazine Features: For use with PTW, STW, CTW Airsoft training rifles High tension spring ensures reliable feeding Heavyweight design provides a more realistic feel than regular AEG magazines Flat grey finish Color: Flat greyCompatibility: A&K STW, Systema PTW, Celcius CTW Airsoft training rifles and other compatible AEGsCapacity: 120 roundsMaterials: Metal alloy, polymerManufacturer: A&K