>>64162898
The HK36 is not the G36, nor the MP7, maybe you should try reading it again and consider how much what's in that part doesn't apply or fit for either of them.

The HK36 was an H&K project in the 1960s, for a roller-delayed assault rifle in a new 4.6x36mm cartridge. It had concepts in common with the G11, and H&K opted to abandon the HK36 in favor of the G11's development.