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Now, pragmatically speaking, there are very few Single Action Only (SAO) (requires manual cocking, or cocking by virtue of recoil cycling of the slide) pistols.

If you mean by "very few" types or designs of pistols, that's arguably correct.

If you mean the number of such pistols in existence, given that the description includes all 1911 pistols, I think you're arguably wrong... :D

I practice with a Glock 19 for cheap ammo. I carry a Glock 23 for more effectiveness. The same holsters and mag holders work with both frames.