ACM A&K PKM Rock’n’Roll (1 trigger 8000 rounds )

You might know this ACM AK PKM able to shot over 4000 rounds in one trigger ,and now we use the same PKM in HKTDC to take a review , we want to know the limit of this , let’s Rock’n’Roll ! P.S. Thank you Hyena and Trigger Happy Arms Custom more details :