Innovation is alive and well in the United States small business world. Case in point: the MagHolder magazine pouch.
Made of injection-molded plastic, the one piece MagHolder carries a single spare magazine horizontally on a belt. This presents a less noticeable bulge under a concealing garment as the magazine follows a natural visual line along the waist instead of breaking the natural line with a perpendicular angle. Think of it as camouflage: the eye is less likely to catch something when the angles flow with expectations.
The MagHolder can be carried on the strong side, requiring a cross-draw move. Additionally, the pouch can be carried on the strong side, which does not require the cross-draw. I carried a double mag pouch horizontally on my duty belt for years when I was still a cop. I carried it roughly in the appendix position and cross-drew the magazines for reloads. I carry my MagHolder in the same way. The video below shows both ways of carrying and drawing from the MagHolder.
On the back of the MagHolder are rows of raised points, which help the pouch stay in place. They bumps are not unlike the polymids of the Glock RTF2 texture.
The magazine is held in place by tabs that snap into the same magazine notches used by the pistol. The tabs exert enough force to prevent the magazines from falling out when shaken, but are easily overcome in a normal drawing motion. I have found they work extremely well.
These magazine pouches seem very durable, and after several weeks of use, mine look as good as the day they arrived in the mail. They are only $25 each, and can be bought directly from MagHolder or through one of several other retailers.