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Inspector marks, assy marks, proof marks
Where it was made, proof marks, etc..
Depends on what they are. Could be choke markings, proof mark, etc..
Dont believe Browning chambered a rifle for the 6mm Remington cartridge. Do you mean 6.35mm (a pistol)?
It stands for 'Nickel Steel', the material the metal is made from.
= Browning automatic rifle or Beyond all recognition. =
There shouldn't be any official proof marks if it was manufactured in the US. Any marks would be manufacturer's inspection or identification marks and most of these mean nothing after the gun leaves the factory.
They are a code used to denote choke size.
Do you mean .22 rifle? The BLR-22 was first introduced in 1970
Steel treated to have blue color
pistol bears the famous "ELG Oval" which is the mark of the Liege proof house
That stands for the caliber of your firearm,and what ammo should be shot through it.