Warne Smith & Wesson M&P 9/40 Magazine Extension, +3/9mm, +2/.40, Black, 3306-3RD

Warne machined these Magazine Extensions from 6061 T6 aluminum to add extra durability. The Warne Smith & Wesson M&P 9/40 Magazine Extension features an ergonomic shape and finger grooves that make it easier to insert and remove the magazine.