In Blackhawk!'s Carbon-Fiber Composite line, they offer single magazine pouches for both 9mm/40 cal. singlestack mags and 9mm/40 cal. double-stack mags. These have a built-in tension spring that keeps your mag secure but allow rapid removal when you need it. They also offer two different light carriers, one for the detachable pistol lights, such as the M-3 style and one for small personal lights, like the Streamlight and Surefire lights.
These magazine pouches have a built-in tension spring, to hold your magazine in place until you need it and to allow the use of a variety of magazines in each pouch. The most interesting thing about their magazine pouches is that the unique belt clip can be removed and they can be placed side by side on their Dual Rail Accessory Platform, for those wanting a double magazine pouch, on the same carrier. Or, they can be placed beside one of their light carriers, for a combo light/mag carrier.