SRC 300 round high-cap M4 magazine SM4-89.
This metal with ABS M4/M16 mag holds up to 300 BBs and has a charging winder on the bottom and large filling door on top.
Fits most M4 and M16 airsoft rifles including all SRC models.
 
SPECIFICATIONS
300 rounds
1:1 scale
Metal and ABS
Bottom winder
Large filling door