Krzysztof from Heavy Airsoft Gear has interesting offer. If you a) want PKM b) have access to CNC lathe c) know what you are doing you can have replica of Eastern heavy support weapon for cheap:
Hello Guys,
In Heavy Airsoft Gear We make new project, idea please check this poster. I think no one made this before us.
Best regards
Krzysztof
From
http://airsoft-news.eu/