Most Fclass bipods attach to an Anschutz style rail. If not equipped with one you can buy a rail section from Champion Shooting Supply and simply screw it onto the forend. I used a Manners T4A for a while and liked it until relegating back to tac rifle. I use a custom stock now. The main point is the bottom of the butt should be straight, no taper, and parallel to the forend. Secret - A Choate is as good as you will find and has all these features plus aluminum bedding block for $200.