This makes sense. Here's what I've found so far at www.thefreelibrary.com. This is an excerpt from James Tarr's article in the Aug 21, 2013 issue of "Guns and Ammo." He primarily examines the Mustang XSP, but makes reference to the XSE also.Xtra Special Enhancements ?
And this item from Frank W. James' article in the March 10, 2011 issue of Shotgun News:In case you're wondering what "XSP" stands for (my guess was "XTra Special Polymer"), RJ Contorno of Colt explained, "XSP is sort of a carryover from our XSE series of pistols. The XSE line is a line with many upgrades from our standard line, such as dovetailed front and rear sights, etc. We changed the 'E' to a 'P' simply because the new Mustang has a polymer grip frame."
I hope no one else is confused here. I've found references to XSE as cars, Marvel comics, Chinese solar makers, etc.Colt also offers upgraded versions with their "XSE Series of 1911, pistols that Carry a number of features that were formerly the province of aftermarket suppliers and custom pistol makers. Other offerings in the 1911 product line from Colt include the Colt Rail Gun, the Colt Defender, the Colt New Agent and the Colt New Agent Double Action Only. The Colt Gold Cup is available but it can also be had in various upgraded models for both competition use, duty and use as a personal defense weapon.