Made of nearly indestructible Zytel, these magazine bumpers are designed to enable your factory magazines to load five extra rounds. These bumpers extend the bottom of the magazine to allow for more grip and better handling. Even more importantly, they help with seating magazines securely into the pistol frame by providing extra material to "bump" them into a locked state. From competition shooters to casual backyard plinkers, everyone can benefit with these simple to install upgrades. Installing the bumper removes the magazine follower button so the last round hold open feature will be disabled. Sold in packs of 2. Mfg: Tandemkross