I order one and tried it out. The first time I used the brackets that hold magnetospeed on the tube would loosen up about every 5 or so shots. Then Wiser sent me a new bracket before I even had a chance to talk about the problem. It has a clamping setup. When I had adjusted the Magnetospeed I tighten the buckle and the clamp. I was able to shoot 35 rounds with out any more adjustments. I realy like the mount now. https://wiser-precision.myshopify.com/