Help with Arisaka Type 99

[nwilliams]

I added another rifle to my ever growing milsurp collection today! For $125 there's no way I could pass it up!

I picked up this Arisaka Type 99 Izawa Jyuko 4th series the other day for $125 and I think I got a pretty good deal on it. The mum is still pretty much intact and overall it's in pretty good shape with a real nice shiny bore. The number on the bolt doesn't match the receiver but from what I understand that's not uncommon, the number on the front barrel band is correct however.

One thing I can't figure out are these two little holed prongs sticking out of the front barrel band, anyone know what these are for?

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