Hold your weapon by grasping the sling
     at the upper sling swivel, letting the
     handguard rest on you forearm and the
     butt of the weapon drag on the ground,
     thus keeping the muzzle off the ground.

  Move forward by:

• Pushing both arms forward while
  pulling your right leg forward.
• Pulling with both arms while pushing
  with your right leg.
• Continuing this push-pull movement until you reach your next position, changing your pushing leg frequently to avoid fatigue.