Easier Aiming With Pistol
To aim better with the pistol, press X to pull it out. The crosshair should appear normal. Then, press Up on the D-pad and the crosshair should become a laser sight. This makes it very easy to aim, since the laser sight is smaller and thinner than the normal crosshair. This allows fast kills and head shots. If you are in dark corners and have the laser sight on, the enemies will notice and attack you.