You can, but it'll require some parts and modification of your existing FF tube. You'll need to remove the existing versapod mounting bracket and add a small section of radiused picatinny rail in its place in order to mount the Atlas which is ONLY available as a rail mount bipod. Something like the Accu-Shot BT33 rail section/mounting bracket should work.
Not sure if the LB free-float tube has other holes pre-drilled for such an endeavor, but if not, you'll need to drill the tube to add the rail section. It isn't rocket science, but if you aren't comfortable with the work, any competent smith should be able to handle it for you without any trouble.
