If you are worried about someone getting access to you handgun then Sentry has the answer for you. At .08 cubic feet is has enough room for a full sized handgun and a ready supply of ammo.

It opens silently with a gas piston cushion piston that allows you to draw your weapon in complete silence. This is the perfect gun safe for police, military, and other First Responders who are required to be armed at all times and yet prevents theft or a curious child from gaining access to your weapon.
http://gunsafely.com/sentry-safe-biometric-quick-access-pistol-safe-review/