This is Mesa's Low-tube Adapter only. It allows you to use your choice of stock and grip to setup your shotgun the way you like it. These are of the same stellar quality you are used to seeing in all of Mesa`s products. The adapter has mounting points which allow you great choice of options such as shell carriers, rails, and other items. The mounting points have stainless steel thread inserts heliocoiled into them for greater strength and durability. The adapter also includes three QD attachment points for Uncle Mike's style QD swivels. As with all Mesa products these are backed up by a lifetime warranty.