Stuffing magazines into a backpack is highly inefficient for combat scenarios. Hence, the plate carrier was invented, and todays airsoft athletes have been quick to deploy it. This one from Lancer Tactical is great for both beginners and experts.
The front pouches carry three M4 or AK magazines, though other magazines of similar size also fit. There are also side pouches for two more. In the case of narrow sub-machine gun magazines, the larger pouches boast around twice as much storage space than normal models.
The MOLLE webbing will even let you add extra accessories for increased combat effectiveness. You can add extra pouches for magazines or other objects such as flashlights and airsoft grenades.