The insertion to the hull of A&K machinegun`s ammo box not only increases total volume of bullets inside it, but also it increases the speed and durability of bullets upload into hop-up chamber (and also it allow to adjust upload speed as you like).   

Fast and stable bullets upload, high volume of bullets and precise adjustment - it`s the thing you need to use potential of your machnigun completely.   

Reinforced engine with reducer which uploads bullets with more power and heats less than the standard one. Uploading mechanism was simplified and made of aluminium which makes it more durable than the standard ones. Also you may adjust in real time the uploading due to the type of your machinegun.