· Gold Bullet member
Not Kanji... GI Approximation. Since each "leg" of the characters is the same size, I am assuming the kanji was done with a screwdriver tip held straight on and tapped with a hammer. There is, in my mind, also an equal chance that the stock was carved on by a young recipient of a WWII souvenir to mark his "gun" for neighborhood cops and robbers? It is clearly vintage. No harm in some oil and cleanup.