Hello Archer,
Found it very interesting about the square and "V" cuts on the screws. What time period do you date your rifle to?
Had the armours mark on my barrel translated by Manouchehr on the Swordd Forum in the middle Eastern arms section. That forum is swords only so just post the armors mark and ask for a translation, if its Farsi you will get a translation for it.
http://www.swordforum.com/
above link is for sword forum
http://forums.swordforum.com/showthread.php?t=81698
Aove link is thread showing translations
rand