dillonprecision.com sells this item.
They call it: SOS-DL (One Magazine, One Tactical Light Pouch)
NRA Life Member - Orange Gunsite Member - NRA Certified Pistol Instructor
"When plunder becomes a way of life for a group of men living together in society,
they create for themselves in the course of time a legal system that authorizes it and a moral code that justifies it." Frederic Bastiat