Administrative Results reviews the PTR 32P PDWR, a 7.62x39 HK roller-delayed blowback gun which they call the "German Draco." Despite initial reservations, he has come to enjoy the firearm and notes its potential for customization. He talks about the unique nature of a western-quality firearm firing the plentiful 7.62x39 ammunition, mentioning it would be ideal for a mercenary in Africa.

The HK51? Close, but no. Take a look at the PTR PDWR in this video by Administrative Results... "The HK51 is a legendary compact firearm that traces its roots back to Heckler & Koch’s G3 rifle platform. By drastically shortening the barrel and overall length, the HK51 was designed to provide devastating firepower in a much smaller, more maneuverable form.