" Manual-String-Release " machine gun , P504 MA:KUN .

Separated Barrels .

Upper : 46 rounds .
Lower : 21 rounds .

First , coiling the string around a pin and hanging a rubberband 2 or 3 times .

When the string is pulled , rubberbands are released .

Full loading 46 or 21 rounds .

Inserting the barrel into the barrel-jacket .

Setting the string's loop at a claw of the drum .

Turning a handle , the rubberbands are released .

The barrel in the jacket .

MA:KUN ( Maku-Kun ) means " Mr. WIND-UP " in japanese .

Side-view right .

Side-view left .

Folding crank handle .

Bipod .

Folding .

It is detachable .

Sight .

All-view with a 46 rounds separate barrel .

Please watch video .