These have been replaced with the SCR models now, this is probably last stock of these anywhere if I had to guess:
BH-55 SC BALLHEAD
Overview: A Really Right Stuff ballhead is the best choice for all precision firearms needs, and will give you fast and accurate control and solid support of your firearms and observation equipment. Aiming and horizon leveling can be accomplished as one instinctive motion, and rigid lockup takes...
thermalopticsplus.com
BH-40 SC BALLHEAD
Overview A Really Right Stuff ball head is the best choice for all precision firearms needs, and will give you fast and accurate control and solid support of your firearms and observation equipment. Aiming and horizon leveling can be accomplished as one instinctive motion, and rigid lockup takes...
thermalopticsplus.com