The mount is especially designed for tactical operations. The mount places the rear sling attachment in front of the user. This allows shooters to shoulder their weapons quickly without becoming tangled. The mount also allows a single point attachment, or it can be used with a front sling mount for a two-point sling installation. The loop on the mount allows you to attach up to a 1 ¼ inch wide sling. The rear mount is installed directly behind the receiver in front of the butt stock.
Remington 870 Followers Overview (Vang Comp Systems, CDM Gear, SBE Precision, GG&G, S&J Hardware, Scattergun Technologies, Choate, Nordic)
Why you need to change the factory magazine follower ASAP
I receive many complaints about factory magazine follower from Remington 870 owners. It is cheap and easy to brake. This is number one cause for feeding problems. First Remington 870s had metal followers which were strong and reliable.