mosin-nagant m91/30 help

[moosetaco]

delete

 

[PerversPépère]

Pretty common practice among russian arsenals.
PP.

 

[Swiend]

What does the "KO" stamp mean? Refurb marks?

 

[Swiend]

Looks like an unknown mark...cool!
http://7.62x54r.net/MosinID/MosinMarks04.htm