Is this rust?

[its mcgavin son]

I'm cleaning my uncle's Glock 19 3rd gen and noticed this right now.. I hit the metal piece a few times with a bronze Otis brush coated with M-Pro 7 gun cleaner... No luck..

What do you guys think? Severe copper build up?

[Plisk]

Looks like remnants of the bronze colored lapping compound put on Glocks during production.

Doesn't look like rust to me.

[InGrAM]

Looks like rust to me but it could just be the picture and my eyes. Try a dremel with a polishing stone and oil it afterwards, usually works for me if a brush and hoppes doesn't

[Suvorov]

OH MY GOD!!!! - Don't even think about taking a Dremil to it! -

Some oil + 0000 steel wool will get rust (if that is what it is, off)

Otherwise

Lube it + shoot it a bunch = problem solved!

[2shotjoe]

Yeah, take 0000 steel wool and rust remover.

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[InGrAM]

OH MY GOD!!!! - Don't even think about taking a Dremil to it! -

Some oil + 0000 steel wool will get rust (if that is what it is, off)

Otherwise

Lube it + shoot it a bunch = problem solved!

I take it you've never used a polishing bit before have you They do not remove metal.

[Plisk]

I take it you've never used a polishing bit before have you They do not remove metal.

Polishing metal IS removing metal.

[its mcgavin son]

I take it you've never used a polishing bit before have you They do not remove metal.

Thanks guys. I'll try that steel wool idea!

Now it's another problem:

I cannot smoothly brass check with a loaded magazine/one in the chamber. I can rack a round from a full 10-round magazine with no problem; however, when I gently pulled back on the slide to perform a brass check, the slide did not go foward as it would normally. It failed to go into battery. The entire slide feels stiff.

I don't know what the hell I did.

[its mcgavin son]

What's insane is I did the same exact process (brass check with live rounds) before I field stripped, cleaned, and lubed it -- it worked flawlessly

[Fherot]

Did you seat the spring back into the barrel lug properly? Have to snap it in there good or it'll cause what you're getting.

[its mcgavin son]

Did you seat the spring back into the barrel lug properly? Have to snap it in there good or it'll cause what you're getting.

The spring/guide rod is seated pretty good. It's proportionally flush with the actual curved groove.

[its mcgavin son]

Damn. Might be an error on my part with the spring after all. I just messed with my Glock 26's spring and the subcompact is replicating exactly what the Glock 19 is doing (stiff slide release)..

[InGrAM]

Polishing metal IS removing metal.

Lol, we are talking minute amounts of material. Which will not affect performance of the firearm in anyway. Rubbing steel wool on the rail will do the same exact thing.

[Plisk]

Lol, we are talking minute amounts of material. Which will not affect performance of the firearm in anyway. Rubbing steel wool on the rail will do the same exact thing.

Using still wool will still remove much much less material then a power tool.

I cannot smoothly brass check with a loaded magazine/one in the chamber. I can rack a round from a full 10-round magazine with no problem; however, when I gently pulled back on the slide to perform a brass check, the slide did not go foward as it would normally. It failed to go into battery. The entire slide feels stiff.

I don't know what the hell I did.

How are you grabbing the slide when you're attempting a press check? I use to grab the rear of the slide with my hand behind it (slingshot method essentially) but I would accidentally jack the chambered round out and sometimes mis-feed the next.

Another method you may try is a method I'm having a hard time accurately putting into text, so I'll reference a video.

http://www.youtube.com/watch?v=zJVUsaeEkBU

Skip to :40 and observe the technique shown. It gave me better control over the slide, and may help you properly check and properly place the slide back fully into battery.

[InGrAM]

Using still wool will still remove much much less material then a power tool.



How are you grabbing the slide when you're attempting a press check? I use to grab the rear of the slide with my hand behind it (slingshot method essentially) but I would accidentally jack the chambered round out and sometimes mis-feed the next.

Another method you may try is a method I'm having a hard time accurately putting into text, so I'll reference a video.

http://www.youtube.com/watch?v=zJVUsaeEkBU

Skip to :40 and observe the technique shown. It gave me better control over the slide, and may help you properly check and properly place the slide back fully into battery.

I beg to differ. You are acting like a dremel is an angle grinder and not the precise tool that it is.