The Shield Arms Glock 43 Magazine Extension adds 2 rounds to your OEM Glock 43 magazine. Their 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.Features :Unique easy access floor plate designIndex cuts on the extension bodyMachined from billet 6061 aluminumType 2 anodizedAdds 2 rounds to Glock 43 9mmFits OEM Glock magazines onlyProudly made in the USALifetime warranty