Can anyone I D this bayonet

[Cosmo]

It's about 20 inches. Only stamp is see is the numbers 4068. The tip looks like the end of a standard screwdriver it is not broke. thanks in advance.

 

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[AceShot]

First we're did u find it then i could help figure it out

 

[dnewbury2]

It fits a M91/30 Moisen Nagant rifle used by the USSR in WWII