Like the revolver and the lever-action carbine, the shotgun is still around because it gets the job done and gets it done quite well.
You can say what you want to about your favorite defensive school or those advanced-fighting techniques you learned, but the greatest defensive skill that a person can develop is simply awareness. I will freely admit that developing effective awareness is anything but simple, but being able to spot trouble before it is close enough to get in your face will certainly save you from a lot of trouble and possibly even some pain and grief.
Blackhawk has 20 years of experience making law enforcement and military equipment, and now the company is coming out with models of the Stache IWB holster to fit even more handguns.
When he made the point, my buddy was speaking from a position of strength. Chuck Karwan—West Point graduate, champion heavyweight wrestler, combat platoon leader, Green Beret, outdoorsman, gunwriter—was a bear of a guy. He had an encyclopedic knowledge of firearms of all sorts. Karwan was particularly fond of digging into the development of handguns; sights, systems, breeching, etc.; from Paterson to present.
1791 Gunleather recently introduced several new models of optics-ready handgun holsters.
Even great military service pistols go though a form of evolution.
The EMP series of 1911-style pistols from Springfield Armory was designed specifically around the 9 mm cartridge.