Works like a charm - GG&G Remington 1100/1187 Sling & Flashlight Mount Combo

Machined perfectly to sit on the bag tube. You have 4 points of security holding the product in place on your shotgun: on the top, you have the barrel; on the bottom you have the magazine tube; on the front and back, you have the magazine tube CAP and the tube itself, respectively. This fact, as well as the obvious high quality machining you get from GG&G, should assure you that your rail and it's accessories won't rattle apart during firing. I have a flashlight mount on this and it works wonderfully.