[coho444]

Hi,
I am new here with an M9. I am an active blade collector but plead ignorant on these knives. I picked up one of these M9 Bayonets today alongwith many other knives. I tried to research which model but cant seem to find info. Both sides at the base of the hilt are marked. First side only says M9 other side says U.S.A PAT. NO. 4,821,356



It doesn't say buck anywhere or Phrobis anywhere. What do I have? Thanks in advance.