+5 MAGAZINE EXTENSION FOR SMITH & WESSONA(R) M&P 2.0A(R) The Shield Arms M&P 2.0 Magazine Extension adds 5 rounds to your M&P 2.0 9mm & 40cal magazines. Shield Arms 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. Magazine Extension Features: Index cuts on the extension body to increase grip when coming out of a magazine pouch Increases magazine capacity by 5 rounds Machined from billet 6061 aluminum Type 2 anodized finish Fits O.E.M. S&W 12, 15 and 17 round magazines The stan Mfg: Shield Arms