? about Rust coming from under FSB around barrel

[AMMOTECH]

Called Sabre they and:

The brown stuff I am seeing is the blasting media they use to clean things up right before attatching the FSB. They flash-parkerize under the FSB and they have assued me there is no bare metal. They say when things heat up and there is CLP under there, the media weeps out. They clean it out with an air-hose before it leaves the factory, but some still stays under there and it will just weep out with the CLP when things heat up.

"Flash-parkerized" ?


Some BM barrel info on page .
http://www.smallarmsreview.com/pdf/Blackrifle.pdf


.

[markm]

"Flash-parkerized" ?

I'm assuming they mean a quick dunk in the park tank, and then assembly, then the full park job.

Randall said it's better than no park, but still not how Colt does it.

[OldNavyGuy]

for those who think it is rust, obtain a magnet, place the area of suspect "rust" over the magnet and carefully scrape the "rust" with a pin or X-acto blade, if it sticks to the magnet, it is "rust".., if it don't, it is the burned powder residue or "other" OK ?

[AMMOTECH]

I'm assuming they mean a quick dunk in the park tank, and then assembly, then the full park job.

Randall said it's better than no park, but still not how Colt does it.

I work at FN and as far as I know it's not done that way there either.

[markm]

I work at FN and as far as I know it's not done that way there either.

I wouldn't expect so. I'd guess that they're doing it just like Colt.

[WS6]

Maybe he said flash-phosphated. I don't recall, but it was flash-something.