What gun has 1 power and 5 fire rate (and that I love)? You guessed it! The H11 reapeating sniper rifle! On the first level, there is a hill with an injured G.I under it. Did you notice the box on top? Try to use your parachute and go on top! It contains the H11. It can come in handy inside the canyon.
In the gregorov chase after the two cars try to hit you you can kill the two guys that get out(careful they have flak jackets and a grenade launcher) then get a pk 102 out of the car (this also enables a multiplayer level)