Carlsons Magazine Extension Benelli M4 7 Shot

Add firepower to your favorite shotgun.? These magazine extensions are constructed of blued solid steel and come with spring, base clamp with swivel stud to work with?quick?detachable swivel (not included), and a high visibility follower (some extensions require factory follower and will not come with one).? The threaded tube replaces you magazine cap and gives you the ability to add extra rounds to you magazine.? The magazine extension tube is great for home protection, competition shooting, and law enforcement.