Premium billet, 303 Stainless Steel, not plastic. Easily installed, replaces plastic factory part., Quick easy install, Factory replacement, no permanent modifications needed to install. 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. Specifications for Zaffiri Precision Gen 1-5 Back Plate: Manufacturer: Zaffiri Precision Gun Model: Glock 19, Glock 21, Glock 30, Glock 36, Glock 35, Glock 41, Glock 27, Glock 24, Glock 26, Glock 37, Glock 32, Glock 31, Glock 23, Glock 17, Glock 33, Glock 22, Glock 29, Glock 34, Glock 38, Glock 40, Glock 39 Gun Make: Glock Model Generation: 5, 4, 2, 3, 1 Features of Zaffiri Precision Gen 1-5 Back Plate Fits Gen 1-5. Not compatible with G42 or G43. Fits Glock Models:, G17, G19, G21, G22, G23, G24, G26, G27, G29, G30, G31, G32, G33, G34, G35, G36, G37, G38, G39, G40, G41 Package Contents: Zaffiri Precision Gen 1-5 Back Plate This product is compatible with the following gun models: Glock 30, Glock 41, Glock 40, Glock 35, Glock 34, Glock 24, Glock 22, Glock 17, Glock 21, Glock 39, Glock 36, Glock 19, Glock 38, Glock 29, Glock 33, Glock 27, Glock 37, Glock 26, Glock 32, Glock 31