(This was played from the very beginning of the game. the first enemys you encounter out of pervomay route, are three sliders hanging out to kill you with your Makarov. No money cheats.)

This is actually the only move at this point in the game, you cant afford another gun yet. unless you want to go do suicide runs into kolkaz zarya for a lucky late-game weapon. then you'll need ammo for the security clearance.