My favorite shell carriers - Mesa Tactical SureShell Side Mount Shell Carrier for Remington

Mesa Tactical builds high quality accessories. Everything they build is high quality. This mount is a great way to add a carrier to a Remington 870 that doesn’t have holes tapped in the receiver. They fit well and don’t rattle around. It’s a perfect design for the application. And Mesa has done their typical job of excellent machine work and anodizing. They include a solid hardware package for installation. There are a lot of options in this category, this one is an excellent choice.