I had ordered a cheap on that attached to the swivel stud, and while I waited for it to arrive I made one on my table saw out of Dark Walnut (a tough wood). I'm a professional furniture maker so it was easy. Painted it black and my shooting partner though it was a store bought item. The aluminum one I ordered never did work. Not enough room for the atlas to attach. Chances are I'll just order a sort piece of aluminum picatinny rail and use my second swivel stud just behind where the rail will sit for my longer Harris bipod.