Unless that snubby M10 is a round butt, that M19 will do everything the M10 will do and MORE. Butt shape dictates how well a revolver conceals much more than barrel length. In fact, a 4" barrel revolver in a pancake holster hides better than a 2" because the longer barrel presses against the hip and pushes the butt towards your side. A square butt snubby kinds flops around and tends to stick out.

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John 3:16
WAR EAGLE!