The Shield Arms Smith & Wesson M&P 2.0 Magazine Extension adds 5 rounds to your S&W M&P 2.0 magazine. The unique, easy access floor plate design allows you to quickly access the spring and follower without having to remove the extension from the magazine body.Features :Unique easy access floor plate designIndex cuts on the extension bodyMachined from billet 6061 aluminumType 2 anodizedBlackCompatable with OEM magazine springsFits S&W M&P 2.0Proudly made in the USALifetime warranty