Add two or even three more shells to the capacity of your factory stock magazine tube with our ProMag Magazine Extension. Designed for use on 20" barrels, this mag tube extension measures 9" long and allows you to add 3 additional 2 3/4" shells or 2 additional 3" shells.

Fits Remington 870, 1100, and 11-87 and is backed by ProMag's Lifetime Warranty.
Made in the USA with a lifetime warranty.