Heir Apparent?: Smith & Wesson M&P 45

During most of the 20th century, American combat handgunnery was carried out by men armed with a Colt 1911 chambered in .45 ACP. And what a marvelous choice in fighting weaponry it was. The pages of gun magazines have been swollen over the years with tales of how the U.S. government came to make the decision to contract Colt to make the 1911.
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Most enthusiasts are aware that Colt outfitted the U.S. Cavalry with the Single Action Army in the early 1870′s and that it functioned almost flawlessly. The .45 Colt cartridge, spitting its heavy 250-grain slug, caused the demise of many enemy combatants. But in 1891 the Army decided that the SAA was no longer a viable fighting handgun and opted for the double-action .38 Long Colt revolver, which turned out to be a comparatively feeble choice.