Magazine Extension The Shield Arms Glock 26/27 Magazine Extension adds 5 rounds to your Glock 26 magazine, and 4 rounds to your Glock 27 magazine. Our unique, easy access floor plate design allows you to easily access the spring and follower without having to remove the extension from the magazine body. Comes with a 100% lifetime warranty, and the Shield Arms Spring for Life guarantee. Description: Unique easy access floor plate design to service or clean the magazine body without the need to remove the magazine extension from the magazine body. Index cuts on the extension body to increase grip when coming out of a magazine pouch. Machined from billet 6061 aluminum Type 2 anodized Adds 5 rounds to Glock 26 9mm Adds 4 rounds to Glock 27 40 S&W Comes with a +10% power spring Fits OEM Glock magazines only Proudly made in the USA Fits most aftermarket flared mag wells Lifetime warranty Specifications: Pistol Model Glock 26/27 Caliber 9mm/.40 S&W/.357 SIG Glock Generation Gen 3-5