The First Aid Kit is a 600cc piece of Gear that heals the user when fired. It has a 3 second cool down before it can be used again. It gives the soldier only 50% (But it can be used repeatedly to completely heal the user.)
Experienced Soldiers always place the First Aid Kit or Medkit in the first gear slot for quick and simple access, and only leave it behind if they expect to have frequent access to a Resupply point to heal themselves with.
It is a favoured item of Rookies and Experts alike, for various purposes. It can be crucial when on the front line, although timely to use, and can provide an extra boost when dealing with multiple enemies.
It does not heal or recusitate team mates.