Please help.

[miamivicedade]

I just purchased an SX3 from Dick's Sporting Goods. I couldn't pass on it, as it was $639.99. While giving it it's first cleaning, and inspection, I did see the barrel portion, under the foregrip, seemed miscolored. I just want to get others opinions. I am hoping this isnt rust. Has anyone seen miscoloring on these before?

Addition: The rest of the gun, barrel, bolt, piston, gas system is FLAWLESS.

http://aaronjacobs.com/bp.html

Thanks in advance.

 

[oneounceload]

Dissimilar metals maybe?

 

[miamivicedade]

It's possible. I does not look or feel like rust to me, but then again, I am not really sure what the beginning of rust looks like.

 

[miamivicedade]

Anyone else? Do you think it's rust?

 

[bainter1212]

Looks like a patina to me. Keep it coated with a thin layer of grease or oil and don't worry about it. If it's rust it will wipe off red after soaking in oil for awhile. If no red, then it's patina, and you're all good.

 

[Liberty1776]

To me it looks like a post-metal treatment patina. Maybe even a residual heat treatment patina. Does not look like rust.

 

[gfpd707]

Looks like a heating discoloration. I would oil it and keep an eye on it. Most likely nothing.

 

[miamivicedade]

Thanks. Crap now I am worried.

 

[toivo]

The barrel lugs on Beretta semi-auto shotguns all look like that. It isn't rust.

 

[Uniquedot]

Are you talking about the barrel lug? if so the discoloration is a normal production process.

 

[miamivicedade]

It's the gas bracket. I just looked in the manual.

 

[browningguy]

It's not a problem.

 

[miamivicedade]

Thank you all.

 

[1911 guy]

I agree. It looks to me like the thin metal that bracket is made of merely took coloration due to the heat of soldering to the barrel. The barrel looks fine because it has much more mass to distribute the heat through conduction. That little part just didn't have the same mass to dissipate heat. I say no problem, and if you look at nearly any soldered part on anything, gun or not, small parts are often discolored by heat. If it was a cosmetic issue (not covered by the forend), it would have been buffed out. As is, no harm no foul.

 

[Al Thompson]

Ditto - no issue.

 

[miamivicedade]

Thanks everyone. I appreciate the help.

 

[rcmodel]

I imagine the gas bracket is stainless steel, and the barrel isn't.

Then, it is induction brazed to the barrel and the heat discolors it.
http://en.wikipedia.org/wiki/Induction_brazing

As others said, No problem.

rc

 

[Virginian]

It's fine. Different alloys take bluing differently, and getting a deep rich blue on the gas ring is passe.