SAS_ asset in Sci-fi_FPS_Pack/Blueprints/Weapons to adjust its animation settings. For an introduction, see Making adjustments.
Try an adjustment
DuplicateSAS_Gepard and assign it to your AC_Gepard child view. Change Ads FOV from 80 to 70, equip the weapon, and aim. You should see a narrower view. Restore the value, then try reducing Idle > Intensity to compare idle movement.