MXT shotgun magazine extension tube kit for increasing magazine capacity. Used in conjunction with the MXT extension tube nut, this tube kit will add the stated number of rounds (+1 to +9) to your existing magazine capacity. All capacities are measured using 2.75"" star-crimped shells; for use with 3"" or 3.5"", increase your selection by one or two rounds.
Kits ship with extension tube, tube cap, and full-length spring (+1 tubes have an integral cap and will not include a separate cap).
THIS PRODUCT REQUIRES AN MXT EXTENSION TUBE NUT TO BE INSTALLED ON YOUR SHOTGUN -- THIS TUBE KIT WILL NOT ATTACH WITHOUT THE NUT.