Smith & Wesson's M&P Shield is a slim, concealable, lightweight, striker-fired polymer pistol. Available in 9mm and .40 S&W, the Shield features a slim design combined with the proven and trusted features found in the M&P Pistol Series. From the pistol's easily concealed one-inch profile to its optimized 18-degree grip angle, the Shield offers professional-grade features that provide consumers with simple operation and reliable performance. Every Shield combines a high-strength polymer frame with a black, durable, corrosion-resistant, coated stainless steel slide and barrel. With a quick and audible reset made possible by the striker-fired action, the Shield allows multiple rounds to be placed on target both consistently and accurately. A 5.3-inch sight radius provides for fast tracking and smooth target acquisition and the trigger pull has been enhanced to be short and consistent with a 6.5 pound weight. This model is compliant in Massachusetts. No thumb safety.