I put this on a Remington 700 AAC-SD, it fits very nicely, and Tactical Works even sent me an email about how to install the cheek piece. The AAC-SD comes with a houge rubber over-molded stock, so wherever you adjust the cheek piece, IT STICKS, and doesn't try to shift with recoil, unlike on a friends 700 SPS. But nothing that tightening the knobs can't fix. :) I can shoot my rifle all day with this cheek piece, it's comfortable, as well as superbly functional. When i rest my cheek on the stock, i'm right there in my high scope, and i'm shooting dimes all day. Easy ordering, and quick shipping. I Love Tactical Works. I plan on ordering future products.