I have figured out a way to not get shot or hurt during the mission 'Nazran Town'. What you have to do is run to the gate at the start of the mission. Go to the far left and keep on the wall.

Head up and around the side of the building (not the snipers side) and sneak up the stairs with the grenades. Blow up the bad guys in the room and take the AK47 and Sniper Rifle. Use your last 2 grenades throw them at the headstones.

Now go about your mission normally and you cannot be hurt by anything except for genades or RPGs. If you shoot every headstone in the mission you can also get the M203 (or whatever it is) in the next mission as a bonus but try to keep the weapon you start the next mission with.

Submitted by Sandman01-06 (misticlionknight)