I have rebuilt 4 FWB model 65 pistols over the last couple of years. Feinwerkbau states no lube is needed In period advertising and maintenance instructions. I replaced the buffers and breach seal and rubbed a little dry moly powder into the compression ring and piston skirt as I have read that’s the permanent lube added at the factory. My question is all 4 had varying amounts of grease on the springs. From that I am guessing when FWB says dry they mean piston and ring and not the spring. I just received one from the Netherlands and plan To rebuild it this weekend. This will be the first one that needed a spring. I plan to lube the spring with a small amount of Vortek grease I have left over from tuning kits. Any opinions on if these left the factory with grease on the springs or are they truly dry lubed only?