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Thread: AR15 upper receiver trueing

  1. #1
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    AR15 upper receiver trueing

    I'm wanting to send my AR15 upper out to be trued and matched with a 18" barrel that I have.

    Who here has done it and who did you send it to?

  2. #2
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    IMO, buy a BCM upper receiver and call it a day.

    Nice snug fit of the barrel extension to upper and when mounting my rail (Geissele) barrel is dead nuts on center.

  3. #3
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    Iíve never sent one out. I have used Mega uppers and had to put the barrel in the freezer and heat the upper to get them to fit. I do know either Brownells of Midway has a tool to true the upper receiver face but have never used one.

  4. #4
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    very easy to DIY. lapping tool also avail from PTG. do not use the Wheeler tool.

    lapping tool:
    https://www.brownells.com/gunsmith-t...prod20220.aspx
    http://pacifictoolandgauge.com/ar-to...ping-tool.html

    lapping compound:
    https://www.brownells.com/gunsmith-t...5658-4085.aspx

    Last edited by rpoL98; 01-27-20 at 17:07.

  5. #5
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    I dont think you need to send it out as you can do the lapping with the Brownells lapping tool if you have a drill. On a decent lower all your looking to do is true up the reciver face which oftentimes does not go past the anodizing. Literally takes 5 min.

    If you are looking to send it out, Robb Jensen who is a major contributor here can do that for you and also bed the reciver. Robb's info - https://eliteshootingsports.com/t-armorer.aspx

    If you are looking for someone to build the whole upper and also accurize it, Steve at citizen arms works wonders - https://www.citizenarms.com/

  6. #6
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    Thank you, everyone.

    I was thinking to send it out because I thought they true and match the upper to the barrel extension.

  7. #7
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    I would contact Retro Arms Works if you want to send it out. he has done a good bit of work for me. Very fast turn around and high quality work

  8. #8
    Join Date
    Sep 2007
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    I have the Brownells tool which is pretty easy to use. I bought it in an attempt to fix a Bushmaster flat top upper that required excessive windage to zero. Turns out the upper was just a Bushmaster piece of shit. A quality upper on the same barrel didn't require the windage correction.
    "You people have too much time on your hands." - scottryan

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