difference between 38 special and 38 long colt
.38 Long Colt In civilian use, the .38 LC was chambered in a number of Colt revolvers and saw some use among target shooters. Various U.S. police forces also adopted the cartridge. However, the cartridge became nearly extinct after Smith & Wesson's more powerful .38 Special cartridge became widely popular as a civilian and police service cartridge. By 1908, even Colt was chambering their new Police Positive and New Army revolvers in ".38 Colt Special", which was nothing more than the standard .38 Smith & Wesson Special with a different headstamp.[10]
Smith & Wesson M&P15 The M&P15 was unveiled at the 2006 SHOT Show, it debuted in two varieties: the M&P15 and the M&P15T.[5] Both are basically the same rifle, chambered in 5.56×45mm NATO, with the T-model featuring folding sights and a four-sided accessories rail fore end. They include the standard direct impingement gas system. In order decrease cost on the original design both the dust cover or forward assist were omitted. These rifles were initially produced for S&W by Stag Arms, but marked and marketed under the Smith & Wesson name.[5] Currently, Smith & Wesson makes the lower receiver in-house, while the barrel is supplied by Thompson/Center Arms, an S&W company acquired in 2007.