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Posted: 12/22/2014 1:05:44 AM EDT
| For those of you who use the Brownell's lapping tool, what are you looking for in regards to polishing it? I have worked on mine some and have more or less removed the anodizing and at least in one spot you can see it has started to polish the concentric casting marks/rings(as best as I can describe them). Would y'all stop there or would you keep going with the process to actually even out the aluminum itself? |
| I believe they normally go until at least 2/3 to 3/4 of the anodizing is removed. If you just have a little area where its removed then you have only really knocked down a little of the high spot and have more hight to take down. If all the anodizing is removed all at once then your reciever was pretty true before you started. You can also clean it up and blacken the shiny surface with a per mint marker, or better yet machinst blue. Then see if it all comes off at once or if you still have high spots. If you have all the anodizing off now it should be true. The main part is to see what the removal pattern is. |
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I've done quite a few and my standard is once about 90% of the anodizing is cut through around the circumfrence of the upper face I consider it done. On;y reason to go any further is if you're caught between teeth on the barrel nut, but I've never had to do that.
I go slow and I use 600 grit compound to help me go slower still, and even with the 600 it still takes typically less than a minute. |
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Quoted:
Curious who the upper receiver manufacturer was. Never had one come off evenly like that. Quoted:
Quoted:
It definitely did all come off evenly. I think I'll use a marker on it and see if it now comes off at the same time all the way around. Curious who the upper receiver manufacturer was. Never had one come off evenly like that. Dang, I was reading back through my thread and saw my mistake, then I saw your reply. I meant din NOT come off evenly. Sorry, will edit. |
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