Posted: 3/3/2010 6:48:37 PM EDT
| I saw the other day a 4th Gen 22 with the barrel and slide in a gray finish. When did this change and why? |
| I don't own a Glock with the new finish, but my dad's G26 barrel has the new finish. It's holding up very well. The smilies don't seem to wear through to a bare steel color the way the old barrels do. You can see the smiles, but they're still black. Not sure if this makes a difference as I've never had an old style barrel get even an hint of rust on it. |
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really? I have never seen a factory barrel or slide in anything other than black. pics? The newer slides/barrels are manganese phosphate. Like an AR-15 barrel. Does that mean no more Tennifer Finish? The phosphate finish has nothing to do with the Tennifer process. |
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Quoted: Quoted: Quoted: really? I have never seen a factory barrel or slide in anything other than black. pics? The newer slides/barrels are manganese phosphate. Like an AR-15 barrel. Does that mean no more Tennifer Finish? No, the Tenifer process isn't a 'finish' but rather a salt bath nitriding process that hardens the top layer of the metal itself. Historically, firearm parts were black oxided, which is an oxidation process which is only a few millionths of an inch thick, does not offer much corrosion resistance, and doesn't alter the underlying steel. Basically its controlled rusting of the iron or carbon steel its applied to. Salt bath nitriding is a case hardening process that leaves a fairly thick, corrosion resistant, hard surface. Salt bath nitride coatings are probably hundreds of times thicker than black oxide coatings and will still be there long after the black finish is worn off. Manganese phosphate is one of the various types of parkerizing which are phosphating processes. I.e. the treatment of iron or steel by immersion in a dilute solution of phosphoric acid and other additives. In the resulting chemical reactions, the surface of the metal is chemically converted to an integral protective layer of insoluble zinc and iron or manganese and iron phosphate crystals. The color in its natural state is various shades of grey, but the thicker variants (like manganese phosphate) can be dyed black or another dark color. Parkerizing's porous nature allows it to soak up oil or some other preservative, and this greatly improves it corrosion resistance which is why its popular on military weapons like the M1, M1 Carbine, M14, and M16. |
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When did this change and why? A year +/- Faster/cheaper. The Gen4 17 I handled still had the "old" finish (which I prefer). None of the shops have gotten any of these "new finish" guns either. Here's hoping the old finish stays, IMO, and the newer finish either becomes an option or goes the way of the scallop slide serrations on the early RTF guns. |
