If you think that buying any safe will do, you should get a professional’s opinion. Using an ordinary drawer or a cash box for your pistol is not appropriate at all. Gun owners should own GUN SAFES.
Not placing your gun in a safe could cause an explosion if it is exposed to fire. A gun is one thing that could trigger a person to change and think differently one he is in possession of one that’s why it should be kept in a very secure location.
In purchasing a safe for your gun, you have to keep in mind that it should be made of really thick steel. It makes a lot of sense to go with a safe which has thicker doors since it cannot be easily damaged by fire or opened through an ax or saw. For fire protection, it has to be UL tested to ensure that it can endure the heat it could be put through.

