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Posted: 8/17/2013 5:41:40 AM EDT
| was going to order some parts, and keep seeing this tool. For you people who build yourself have you had to use this tool to true a receiver or is gonna gather dust from non use? or do you buy it if you have a problem with a particular upper and use it Now they are only 18.00 so what are your thoughts? would like to hear from manufacturers especially if used thanks |
| For $18 it wouldn't be a bad thing to have "just in case." I have yet to encounter an upper that needed it, but I can't say I won't. I'd see a use with those increasingly available "blemished" uppers, where maybe the blemish is inconsistent anodizing... maybe on the front face of the upper. |
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For $18 it wouldn't be a bad thing to have "just in case." I have yet to encounter an upper that needed it, but I can't say I won't. I'd see a use with those increasingly available "blemished" uppers, where maybe the blemish is inconsistent anodizing... maybe on the front face of the upper. Where did you see one for $18? They are $35 at Brownell's. |
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Anodizing adds a lot of corrosion resistance to aluminum. Those tools remove anodizing. Never the less I would think there are cases where lapping would be appropriate. If it does have a problem beyond the surface left by the anodizing process, then we're definitely talking about a "seconds" upper, in which case it was either really cheap, or it's going back! If you do get down to bare metal doing that, you can use something like Aluminum Black to protect it - and using a quality barrel nut grease will finish the protection process. |
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On 16" rifles or longer I use my lapping tool.
I've seen it enough times that the barrel points in a direction that is not straight in line with the rail system that's being used. For SBR uppers that aren't going to be shot to 300 yards I don't worry with it much. |
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On 16" rifles or longer I use my lapping tool. I've seen it enough times that the barrel points in a direction that is not straight in line with the rail system that's being used. For SBR uppers that aren't going to be shot to 300 yards I don't worry with it much. Good advice. |
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I thought they were intended to lap the face of the upper receiver and not the internal diameter? I'm not quite sure the benefit of lapping the ID unless you have an extension that does not fit. B Lapping isn't necessary in 99% of uppers. Some uppers can be really tight and lapping can make assembly and operation of the firearm easier/smoother. I do check every upper I assemble with the tool, I have only ran across a few that the tool wouldn't slide in and out of easily. |
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Amazingly little material needs to be removed from that barrel flange mating surface to " clock " a barrel nut and/or the grooves/ slots/ -or- rail on a hand guard tube.
I'm satisfied with the usefulness of the marginally priced tool. I'd rather lap a few thousandths off the upper receiver than rely on (too) thin spacer washers and such. |
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