MODIFY-TECH J-MAG 300Rds Quick Loading Magazine with LED Box for AR AEG Series ( Black )

Manual winding hi-capacity magazine
Winding crank with low-profile, folding handle for easy access
Textured body with special designed base pad for positive grip
LED unit automatically turns on when inserted, for using with tracer BB bullet
Tracer unit powered by 3x LR41 batteries ( included )
Suitable for Modify XTC AEG and M4/M16 AEGs