Fyi
The 1911 pistol (pre-series 80) uses a floating firing pin, which is shorter than the distance it travels, and a spring, to return it to the rear after hitting the primer. The spring also prevents the pin from moving forward due to inertia. You can get the gun to fire from dropping it, but it has to fall about 30 feet (to build up enough velocity to overcome both inertia and the firing pin spring), AND land muzzle down and ON A HARD SURFACE (to provide an instant stop so the pin would accelerate at max speed). Now, since the muzzle is in contact with the hard surface at the time of discharge, a ricochet is a possibility in this unlikely situation, as the bullet would be fired directly into the hard surface (like concrete, for example).
It is virtually impossible to discharge a properly functional 1911 pistol by dropping it. This has been tested by numerous labs (H.P. White Labs, for one). Even if the gun lands so that something presses on the trigger (hammer cocked), the grip safety system will keep the gun from discharging.
I believe Colt added the series 80 firing pin block to meet some import restrictions (like into the Democratic Peoples Republic of California), not because of any real need.
Modern lever action rifles have had additional safeties incorporated into their designs, in an effort to keep lawyers from sueing, because they are "not safe enough". I fail to understand how something that has been in daily use for 50years, or even 100 years could suddenly be "unsafe" when it wasn't before.
The mind boggles.