Canyou tell from a casual glance whether a holstered revolver on another person is loaded ?
I feel that the same applies to a semiauto bearing an unloaded magazine.
An empty magazine is easily and quickly ejectedasthe firearm is drawn, and live magazine inserted, in one simple, practiced movement.
The whiney pantywaists who decry UOC claim with unwavering certainty that the bad guys will just take the gun away from you if they can see that it is unloaded. O.K., fine. And empty mag in the mag well will keep the bad guys from seeing that the firearm is unloaded. Whiney pantywaist concern is rendered moot.