Mas also carries a T3 and probably any number of other pieces depending on the flavor of the month:
"I’m writing this after 2 months with the Nighthawk T3 as my primary carry gun, loaded with Winchester Ranger-T .45 ACP 230-grain JHP. Modern bullets like the Ranger-T are designed to expand even out of shorter barrels. I acquired the T3 in 2009, before Nighthawk offered it in the lightweight format; done over again, I’d take the latter. The factory Colt sights on my lightweight CCOs are good, but the Heinie Straight Eights on my Nighthawk are better, hence the current preference. Even in all-steel format, they’re still slim 1911s that ride oh-so-comfortably inside the waistband, and in an outside the belt holster, the 4.25-inch barrel length lets enough slide ride against the hip to tuck the butt firmly and discreetly into the body."
Read more: http://dailycaller.com/2013/09/23/massad-ayoob-the-colt-concealed-carry-officers-and-its-niche-mates/#ixzz3sqQQa44D