Sylvan Arms 43 2 Magazine Extensions – This magazine extension allows for a more secure and comfortable grip, giving you better accuracy all while adding an extra 2 rounds to your Glock compatible 43/6 round magazines.Product Details Weight: 1.210 oz. Material: 6061-T6 Aluminum Finish: Black AnodizedDisclaimer: 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. Comes with our Sylvan Arms lifetime warranty!