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Posted: 11/22/2009 8:27:15 PM EDT
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I need some advise. I have a sdi ss 16' barrel and I'm replacing a samson low profile gasblock for a vltor gas block. Both are set screw models. Originally the barrel had what I thought was a duracout finish and the samson gas block went right over that. The problem I'm having is that the samson gb slides right off but the vltor is so tight that I had to remove the finish to get it on. Their both .750 but one is obviously much wider than the other. So I was looking to redue the finish anyways because the first finish I had done was pealing off badly and I doubt it was duracoat. Now I'm not sure if I refinish that barrel I'll be able to get the vltor gas block on. I was told to just put one coat of finish on the area where the gas block fits. I'm not sure what to do now. Duracoat it with the gas block in? I just was'nt expecting a difference in the gas blocks like that. Maybe the samson is to loose? I sure don't want to jack up a finish just putting on a gas block on. Any help would be greatly appeciated. I got burned on the original paying finish so I'm just trying not to get hosed again.
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Quoted: Depending on how much you need to sand I'd use either 80grit or 120 grit sanding tubes. Don't remove too much material at once. Sand some then test, repeat. You want it to fit over your new coating but still fit tight.
Quoted: Do you have a Dremel. You could polish/lightly sand the gas block instead. Had'nt thought about that. What material would you recommend using? |
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Quoted:
Quoted:
Depending on how much you need to sand I'd use either 80grit or 120 grit sanding tubes. Don't remove too much material at once. Sand some then test, repeat. You want it to fit over your new coating but still fit tight.Quoted:
Do you have a Dremel. You could polish/lightly sand the gas block instead.
Had'nt thought about that. What material would you recommend using? That sounds good Honorable Dog. Makes sense. I'd feel a lot better custom fitting the block that way after refinishing the barrel. Thanks I appreciate the advise. |
| Don't do it with a dremel, it's too easy to remove WAY to much material.Take a piece of 100 grit wet/dry paper, wrap it around your finger with a LIGHT coat of wd40...and sit there and just hone it out while you watch tv.Keep checking the fit every 10 minutes or so,and you'll be surprised how nice it will slide on. |
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Quoted:
Depending on how much difference exists, I would try to heat up the gb a little. Do you mean as far as just getting it on? Reason I ask is I was wondering if the metal on these blocks expands when heated up but don't cool down to their original shape. Other wise I would think you would have to reheat to remove and hope the barrel doesn't expand as well. |
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Quoted:
Don't do it with a dremel, it's too easy to remove WAY to much material.Take a piece of 100 grit wet/dry paper, wrap it around your finger with a LIGHT coat of wd40...and sit there and just hone it out while you watch tv.Keep checking the fit every 10 minutes or so,and you'll be surprised how nice it will slide on. I was wondering if a dremel was used if one of those flap sanding/polishing type attachments would work. Where the flaps apply a smaller amount of preasure on the surface compared to a sanding tube. I suppose if you dont apply to much preasure with you finger, you can still maintain an even roundness to the surface also. |
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I wouldn't use a Dremel with anything highly abrasive. I'd try a felt wheel and some Flitz before I did that. I'd probably use some sandpaper by hand before I even used a power tool, maybe 200-400 grit.
Duracoat is a fairly thick finish, all things considered. And if you're having fitment troubles now, I would not add another coat of Duracoat to the mix. I'd sandblast the old finish off with aluminum oxide, degrease three times, and coat with Gun Kote, which is much thinner. Bake it and finish assembly. |
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Quoted:
I wouldn't use a Dremel with anything highly abrasive. I'd try a felt wheel and some Flitz before I did that. I'd probably use some sandpaper by hand before I even used a power tool, maybe 200-400 grit. Duracoat is a fairly thick finish, all things considered. And if you're having fitment troubles now, I would not add another coat of Duracoat to the mix. I'd sandblast the old finish off with aluminum oxide, degrease three times, and coat with Gun Kote, which is much thinner. Bake it and finish assembly. Yeah I'll be removing the old finish completely. Originally I paid to have it finished. It looked good but ended up being crap. I don't believe its duracoat. I got ripped off. I don't know much about Gun Kote. But I think I'll try the hand sanding approach first |
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Quoted:
you want to make sure that you are removing the material evenly throughout the entire gas block. i used a .750" reamer and lots of oil. Gunman40 could you tell me more about that .750 reamer? how is it set up? Hand power? I'm not familiar with them. Thanks |
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