Long Term NP3

[556Cliff]

This is my only AR15 carrier that isn't phosphated and chrome lined. I doubt I will be getting any more.

I was into NiB carriers at one point, but after I experienced the flaking I went back to phosphate and chrome.

How does your carrier look where it makes contact with the hammer? I've seen flaking on the hammer ramp on NiB carriers.

[grizzman]

The hammer contact area is lightly polished, as are the receiver contact surfaces. All exterior surfaces look good.

[Iraqgunz]

Comparing NP3 to NiB shows a lack of understanding of the two processes and their differences. This has been addressed before in other threads.

As to the flaking. We changed vendors and as a result the newer carriers were not in the raw. The NP3 was applied over the hard chrome but it cannot adhere to it. What should have happened is that the inside of the carrier was supposed to be lightly polished inside and that would have removed the issue. Unfortunately this did not happen with a small number of carriers. Had someone contacted SIONICS (which I suspect did not happen) this would have been explained.

NP3 is not new, and ROBAR has been doing it for years. It's also been proven effective. We have guns in the hands of LE as well as demo guns with more rounds through them than any gun owner will likely shoot in their lifetime and there have been no issues.

[556Cliff]

Comparing NP3 to NiB shows a lack of understanding of the two processes and their differences. This has been addressed before in other threads.

As to the flaking. We changed vendors and as a result the newer carriers were not in the raw. The NP3 was applied over the hard chrome but it cannot adhere to it. What should have happened is that the inside of the carrier was supposed to be lightly polished inside and that would have removed the issue. Unfortunately this did not happen with a small number of carriers. Had someone contacted SIONICS (which I suspect did not happen) this would have been explained.

NP3 is not new, and ROBAR has been doing it for years. It's also been proven effective. We have guns in the hands of LE as well as demo guns with more rounds through them than any gun owner will likely shoot in their lifetime and there have been no issues.

So will newer SIONICS carriers be chromed internally, or NP3 only?

[Bravo Sierra]

Slightly off subject but i have a dlc coated bcg. Ive never looked at the contact points but i will tonight. I recall trying to scratch it with keys, nails, an awl. No effect. The coating manufacturer is out of business, all i remember through some email exchanges is he told me that he was an oil guy and they use that coating on their oil drills in texas.

[Iraqgunz]

The new carriers will have the chrome inside, with the NP3 applied over.

So will newer SIONICS carriers be chromed internally, or NP3 only?

[grizzman]

When I called Sionics, I was led to believe that the gas cylinder will continue to be chromed and that Robar is now plugging the carriers so that the gas chamber doesn't get NP3. He didn't mention roughing up the chrome to make the NP3 stick. He simply said that it won't adhere to chrome.

[IndustrialHalo]

Will have to check inside my bcg to see which version I have. Not enough rounds to make a difference. I don't mind buying more sionics parts if it needs replaced eventually.

[vicious_cb]

Here is a brand new, recent purchase NP3 bolt carrier straight from Sionics. Is this how the polished interior with chrome underneath is supposed to look like?