The ProMag magazine grip spacer / grip extension allows the use of Glock 19 / 23 magazines in Glock 26 / 27 pistols. The spacer takes up the space between the bottom of the frame and the floor plate of the longer magazines. The spacer is held in place by a single allen head cap screw. The spacer is textured to match the Glock pistol frame. The spacer is constructed from injection molded black polymer. Does not fit Gen 4 Glock pistols. FeaturesSpacer is textured to match the Glock pistol frameMade of injection molded black polymerDoes not fit GEN 4 Glock Pistols DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.