H&K Rear sight tool

Does anyone know if the HK91,HK93,HK94 and the special weapons sw5 use the same rear sight adjusting tool? Reason I ask is that I brought my HK91 and HK93 to the range and tried to adjust the rear sight with the tool that came with my special weapons sw5 and it would not work. I plan to purchase a genuine HK tool but wasn't sure if the 91,93,94 use the same tool. Busmaster website lists the tool as "HK91,HK93". Any info appreciated! Thanks in advance, Rayzor25