in case you like to turn your WE G17 mag into a Menendez v2 FGC9 mag. then that is possible with this part. this is pure cosmetic or in other words to simulate the size of the Menendez v2 FGC9 mag. this can be used with a WE G19 airsoft pistol. or with the FGC-6 WE TECH edition. with that said you can also just buy bigger mag types from WE TECH for the FGC-6 so long you stay in the G series.
The author hasn't provided the model origin yet.