Synthetic ATF? I personally use tetra grease. A POF roller cam pin is an option too. I have used a standard cam pin for over 3,000 rounds on my 5.45x39 with osprey 416, and have less wear than that. I ordered a pof roller, just because I was ordering one for my 14.5 bcm, I just got, so I ordered 2. There is also a buffer at heavybuffers for piston systems to prevent tilt you could try. I have no experience with that either.