MagPump Magazine Retainer 9mm Double Stack Magazines STI Black MR-STI

MagPump Magazine Retainer 9mm Double Stack Magazines STI Black MR-STI. In an effort to pump up the performance level of one of America's most popular handgun calibers MagPump introduces new double stack magazine retainers The retainers come in a set of six and are designed to fit popular double stack magazines. The pump is easily installed by hand and features an ergonomically designed barricade stop on the lower face. The pump's end face now features a ribbed surface to prevent the magazine fr