The Harris attaches to your sling stud, and would certainly mount up to your Featherweight. It has it's own stud to replace the one it uses on the rifle, so you can still attach a sling. Yes, it may get in your way, but you can adjust your grip accordingly.
One caution though, If your barrel is not free floated with enough clearance, the pressure exerted on the forearm when using the bipod can cause your POI to shift.