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Posted: 12/6/2010 8:06:33 AM EDT
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Hey all,
I am buliding my AR SBR 9MM and from what I've been reading, I should probably encounter issues with feeding and extracting casings. I keep hearing about different types of polishing compounds and steel wool and 1) What type of polishing compound/grit and/or steel wool is recommended for polishing? I have a dremel to work the compound in. 2) Where do I purchase these products? Thanks in advance for your assistance. Best Regards, Zach Kirkpatrick |
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I'm not sure what you want to polish.
Steel wool is not a polish material suitable for use on guns. Most polishes for guns are either rubber bonded abrasive shapes like cylinders, or wheels, or are polishing pastes or cake-like compounds used on hard felt wheels or cylinders. The abrasive rubber shapes come in different grits, sizes, and shapes. The polishing media usually comes in cakes or paper tubes in various grits and compounds for various materials. As example there are compounds especially for steel and others for gold or plastics. These are used by "charging" a felt wheel or cylinder by running the tool and pressing the wheel against the media so it embeds into the felt. In either the rubber or felt polishing tips, it's absolutely critical that you select the correct grit and shape for the job. Go too coarse a grit and you can ruin a part almost instantly. The idea of "polishing" gun parts is to SMOOTH the surface, not polish it like a mirror. Polishing to a mirror shine very often ruins parts by removing too much metal and either breaking through the hardened surface or altering the critical surfaces. What you want is to "polish" JUST enough to smooth any machine marks to eliminate any catching or sticking. This doesn't require removing ALL machine marks from the area, just enough to prevent any problems. Be warned that polishing gun parts is one of the most common ways of ruining parts or entire firearms, ESPECIALLY with a Dremel tool. You really need to fully understand EXACTLY what you're doing and what needs to be done. You can buy the rubber bonded abrasive shapes, felt wheels and cylinders and polishing media from Brownell's, and from many jeweler's supply houses. Contrary to what you may have heard or read, polishing gun parts is something you want to approach VERY reluctantly, and only if you absolutely have to. My advice is to shoot the gun first to see if anything is really needed. If it is, get some real expert advice on exactly what to do and what to do it with. |
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