[ACMcom]

I bought an underfolder flat from a member of another board. It was made by AK-Builder. Does anyone know what kind of steel those flats are made of? do I heat treat it like a crapco flat?

 

[VaFisher]

KA Flat

You need to go back and ask him to be sure of what you have.

 

[sct1886]

Check what steel was used from the vendor... This is most likely the procedures, closely check out the building info for heat treating.
http://www.surplusrifle.com/ak47/index.asp