Airsoft Sports review the A&K PKM AEG With Wood Kit which they have available... "The AEG  is made of steel, aluminum alloy and wooden fittings. The fire mode is only automatic. There are bipods on the machine gun. Standard sights are made in the form of a front sight on the barrel and a sector aiming bar located on a guide at the rear of the receiver.

The kit comes with an electric box magazine with a capacity of 5000 BBs. Inside is a gearbox specially designed for this machine gun, made of aluminum alloy. All gearbox components are standard and compatible with parts from most other manufacturers. This provides high maintainability and ample opportunities for tuning. Hop-up chamber is unique, not compatible with the M249 type. The electrical part of the mechanism is capable of working without any modifications with batteries with high current output, such as lithium polymer, with a voltage of 7.4V. The machine gun also has a programmable slow-fire function, the control button of which is located at the bottom at the base of the gas tube."