Here is an old "Trick Of The Trade" for making a Colt Government Model/Commander etc. secure.
A set of high quality handcuffs were used to lock it up...and to lock it to a solid object like a cast iron radiator or whatever.
It a neat old trick that was used as an emergency way to lock up a Colt Pattern pistol.
Of course...remember that standard handcuff keys are a lot more common these days than they once were.
The top of the front strap...UNDER ~ NOT through the trigger guard ~ & between the cocked hammer & the rear of the slide. With the Thumb Safety in the ON/UP position.
The firearm was usually locked up "Cocked & Locked" with the magazine still in it.
My disclaimer: You should make your own determination (as a responsible adult) as to if this method would work for you or not.
It is a very old "Trick" (I DID NOT invent it) and I am presenting the photo & info. as a matter of historical record & Colt Firearms Trivia only.
You assume all responsibility should you decide to actually use this technique to secure your own personal firearm.
Also: Please do not make fun of my BBQ style engraved Mexican solid silver grips with the applied real gold stags ~ I like them.