First thank you really much for your input it's really appreciated, i'm a bit bummed for the barrel and bolt, I really didn't thought of it that way but now that you say it, it make sense the typo is really not the same on the barrel and the D is a dead give away.

Quote Originally Posted by krinko View Post
4.The bolt is not original to the rifle. The large grind mark on the rear of the bolt handle indicates the removal of an earlier number and it is not procedure to mark only part of the serial number (006) in that location. So it isn't an official replacement bolt.
Maybe it's me that want it to a real replacement bolt body too much, but I'm really sure that the 81006 serial is marked on the round part of the bolt handle haha!

Quote Originally Posted by krinko View Post
5.The forestock is a post war Ishapore type and this, combined with the other mixed parts---like the nosecap---would seem to indicate a rebuilt sporter, or a rebuilt parts gun. And I do not mean rebuilt at a government facility---sorry if this is bad news.
So I just call the guy that sold it to me and he said that he scrap two originals top handguards because they were almost completely destroy.

Quote Originally Posted by krinko View Post
At any rate, you should be able to shoot this one. If you are worried about headspace and safety because of the unofficially replaced bolt, tie it to a bench and pull the trigger with a long string. If the bolt doesn't blow out of the rifle and go screaming past your ear, you can move up to holding it in your hands.
I check the headspace with small disc gauge, it did not close on the field and the no go ones! still I think I will follow your advice and use a string and be far away just to be sure!