^ No. The little guy in the middle:
My untested observation of this occured while I was thinking about why the striker of that other gun I described tended to slip off the sear when dropped. In other words, just from examining the mechanics of the 1911 sear and hammer relationships.
This is not to say the milspec 1911
can't go off if subjected to high gees in any given direction, but this particular part is less likely to pivot off the full-cock hammer notch because of its inertia. It's sort of "balanced" on the hole in the middle.
Any gee forces* which would tend to rotate its top part clockwise off the hammer's sear notch are counterbalanced by the same gee forces tending to rotate the sear counter-clockwise by the mass below the pivot point in the middle.
However, I can't speak to finely-tuned commercial 1911s in this respect.
Terry
* Excepting
angular acceleration forces.
Pic credit in properties, and thank you, Midway USA