Extend the internal capacity of your favorite pistol's magazine with MagGuts performance conversion kits. A MagGuts kit replaces inner parts of your magazine to provide space for additional round(s) in the same mag tube. Find conversion kits for Glock, Ruger LCP, Sig P238, Smith & Wesson Shield, Kahr and other makes / models of pistols. These kits will internally extend your 9mm, or .380 Auto magazines.