Re: Buying a POF black or NP3??
Regarding whether one is better than the other, NP3 is better, however POF has improved their anodized rifles by using a similar material to NP3 that they term as Silicone Nickel on the interior of the reciever. Combine that with a BCG that is NP3 coated, and the result is almost as good as a NP3 coated receiver.
NP3 is a electroless nickel application combined with Teflon. The finish allows for several things regarding to function; a superior lubricity and lower coeffecient of the mechanism's utilizing the finish without having to use conventional oils, extensively longer durations of use between cleanings, ease of cleaning due to the natural lubricity of the teflon, and though it is a satin nickel finish, it is non-reflective. Because the Teflon is actually locked into the nickel matrix, it actually makes the finish self lubricating. Meaning that as wear occurs, the teflon does not wear off.
From the standpoint of application, NP3 is able to be applied very accurately to the surface, approximately .002 of an inch, allowing for consistant thickness throughout the surface its applied to without affecting the mechanical tolerances of the components. It has a very high Rockwell rating which is neccassary in harsh environments, allowing for excellent corrosion and abrasion resistance.
Lastly, NP3 allows for mechanical tolerances that may become out of spec on stainless steel during its use to excessive use to wear evenly and not on the substrate. basically, if you have components that may creat galling in high use areas, the galling occurs on the NP3 and not on the substrate or plated surface. NP3 is also completely strippable with no ill affect on the substrate it is applied to.
I do not work for Robar, but I have been using their finishes for years on my hard duty use weapons.