Difference?

[Vance]

Can anyone tell me what the difference is between a PK and a PKM? Im trying to get a little research.

[David]

i just did some quick one minute research and i think the pkm was mounted on vehicles and such and the pk was just carried...if i'm wrong, oh well...

[David]

nevermind, forget my last post, i just found this...
"Eight years later, in 1969 a product improved version called the PKM (Pulemyot Kalashnikova Modernizirovanniy) was introduced. The PKM can be easily recognised for its lighter, unfluted barrel and a hinged shoulder strap on the buttstock."