UBB.threads Forums General Militaria Historic and Period Firearms Forum Arisaka question

Hello,

I dont usually mess around with guns but I got a good deal on this one.

My big question is what is this wooden thing hanging off the rear sling fittng?

The seller called it a "chuck" with he said is an armorer's acceptance stamp of some sort.

Is that true? Id like to know before I put it in the forsale section.

thanks D