Add firepower to your favorite shotgun. These magazine extensions are constructed of blued solid steel and come with spring, base clamp, and a high visibility follower. The threaded tube replaces your magazine cap and gives you the ability to add extra rounds to your magazine. Easy to follow instructions are included. Our magazine extensions are great for home protection, competition shooting, and law enforcement. See chart for the make/model and the magazine capacity.Features:Remington 870/1100/11-87/Versa MaxLifetime warranty