I lost a mag latch pin on my Saiga-12 -- replaced it with a piece of screwdriver shank but the diameter was a tad too small -- and then found a barely oversize brass screw that I thought might work.
It did -- after I reduced the head diameter and force screwed it (i.e. pushed real hard) through the bracket hole, latch hole, spring and then the opposite side holes for a nice tight fit. The screw is now more of a pin given the mashing of the tiny threads.
I'm sure that if I keep taking out* the new "screw/pin", it will loosen up, but for now it's tighter than the OEM pin. This may have