ARES Adaptor Set 9mm 45rds Magazine for M4 Series [Code: MAG-038-BK]
Retail Price: 26.99
The ARES Adaptor Set 9mm 45rds Magazine was made specifically for the M4 AEG Series, which in turn makes your AEG look as if it's running 9MM rounds rather than 5.56.
It can fit in:
ARES
VFC
Older G&P models
Tokyo Marui
Krytac
G&G