Nearly all police issue firearms are purchased based on cost and what manufacturer's services come with 'em. Cop weapons tech training, etc. In any case, politics has more to do with procurement than anything else. Cost being the primary reason.
Most new cops, anywhere, have never seen a firearm, of any kind, prior to being hired anyway. The days of cops being shooters are long gone.
"...Need to test for fit and feel for the ones who will use them..." That's irrelevant. Just like it is with the military.
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