Algodoo

The RPK, short for the Russian term Ruchnoy Pulemyot Kalashnikova (Kalashnikov hand-held MG), is a lightweight handheld machine gun. It functions exactly the same as the AK47 mechanically, but has a few different features to make it more suitable as a suppress-fire weapon. These features include a higher-capacity magazine, and a folding bipod for stability in the prone position.

To use: move selector switch to desired firing mode (upper notch is auto, bottom is semi), cycle the action, and fire with trigger or enter/return. Magazine contains 40 rounds.

To field strip: push on tab at back of upper receiver, remove upper receiver, remove the recoil spring, and remove the bolt and carrier group. Reverse this process for re-assembly.

EDITS:
improved ejections, magazine stability, corrected fail to feed issues, made bipod more stable, and improved the reliability