A later model
Smith & Wesson 4506-1 - .45 ACP. Note the lack of a 'step up' in the frame that the older 4506 has as well as the rounded trigger guard. Also note the straight back to the pistol grip versus the curved back on the older model.
The Smith & Wesson 4506 is a third generation semi-auto single action/double action pistol chambered in .45 ACP, with an 8 round magazine. It was produced 1988-1999, with several different makes that include different sights, trigger guards, and grips. The modern variant, the 4506-1, comes with a round trigger guard instead of a squared 'finger step' trigger guard, stainless steel hammer, and stainless steel trigger. The backstrap shape also changed from the 4506 to the 4506-1 (see images). The 4506 series comes with a ambidextrous safety and decocker, and it is a favorite with both law enforcement and private citizens alike.
Film
Television