KWA M11A1 Gas Blowback SMG (NS2 System)
The KWA M11A1 or Mac 11 is the smaller version of the Mac 10. This model is a gas blowback SMG and has both semi and fully-automatic firing capabilities, and wow, is the full auto fast.
This uses an open bolt system, so you will need to cock the bolt back and then put the magazine in or you may risk damaging the hammer mechanism.
It comes with a 48-round magazine in the box and a tool to adjust the hop up which can be seen when the bolt is locked open. This is mainly plastic construction to improve gas efficiency and reduce cool down when using it in our classic British weather.