I have had a lot of my bolt coated before with NP3. I like how easy they are to clean and how and low coefficient of friction and non-stick properties. Once I'm done shooting my mp5sd I can take a rag and just wipe the bolt and everything comes right off. I know that NP3 has been discontinued and now wright armory has something similar called NT7. Just curious if anyone has had it done to their Uzi bolt. Thanks