Originally posted by Nukes
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Squared Upper
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What Mark (PF) says is true. Every one here talking about having to lap uppers got me second guessing myself and what Mark said about his billet upper. So I ordered a lapping tool from Brownell's and finally received it, in early afternoon today. Wanting to check my upper I oiled it up really well and was able to get it to fit but just barely as the machining is to such tight tolerance in the upper. Took my tactical flash light and checked around the receiver, each time turning the lapping tool about 45 degrees. Even with my tactical flash light could not see any light getting through. So I put the lapping tool away for possible need on a future build. I hope I am remembering correctly what LRRPF52 said, but I think he said if no light with this method don't monkey with it. No reason now to put off assembly any longer just need to get it done. Won't be able to fire it other than single shot for a while because I was worrying so much about getting all the parts I needed, I forgot to order Magazines. I guess old age and CRS. Ha ha.
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So I have a question about the lapping tool. I'm considering an Aero Precision COP upper for the build I'm wanting to do. How would one square up the barrel mount, if out of square, with a permanent monolithic rail in the way? What would be the best way to stand off from the tool face? I imagine a drill press might be useful in this application because the chuck is skinnier than my hand held drill.
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Originally posted by smokinghole View PostSo I have a question about the lapping tool. I'm considering an Aero Precision COP upper for the build I'm wanting to do. How would one square up the barrel mount, if out of square, with a permanent monolithic rail in the way? What would be the best way to stand off from the tool face? I imagine a drill press might be useful in this application because the chuck is skinnier than my hand held drill.
If it's true that we are here to help others, then what exactly are the others here for?
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I have a wheeler lapping tool, haven't used it yet. Still gathering parts to complete my build. Plus waiting for my NFA Tax Stamp before putting together after I get the parts.12.5" SBR Grendel - Need Barrel
Surge - Rugged Suppressor
Been a fan of the Grendel from the very beginning and haven't second guessed that choice one time.
Aim small, miss small!
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So do people like the wheeler tool? I was wondering with the extension if it was sloppy or ? I know sometimes those extensions are not so great. Looking at ordering one and well Brownells is OOS on a item I want and Midway has it but sells the wheeler unit. I don't want to pay shipping on 2 orders.....
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Originally posted by spectra View PostSo do people like the wheeler tool? I was wondering with the extension if it was sloppy or ? I know sometimes those extensions are not so great. Looking at ordering one and well Brownells is OOS on a item I want and Midway has it but sells the wheeler unit. I don't want to pay shipping on 2 orders.....
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Originally posted by 2_speed View PostSo..if you're not gonna use Ceracoat or something, what finish does the hoard recommend if you have to remove enough material to get through the anodizing to bare aluminum to get sq
Cheers!
Tom
If you do lap an upper to square the face, you most certainly will remove the anodizing and expose the aluminum - it's an unavoidable part of the process. Nobody I am aware of does anything to re-coat or anodize the upper, afterwards. All I've done was to wipe it with a bit of grease or a light film of Slip 2000 EWL.
The general consensus seems to be that while ceracoating or finishes are pretty, rubbed bare spots are nothing to fear. I seem to remember a picture someone shared of an issue weapon that had been rubbed silly with a scotch brite pad.If it's true that we are here to help others, then what exactly are the others here for?
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