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1911 lug width

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1911 lug width Empty 1911 lug width

Post by watercam Tue Sep 21, 2021 10:58 am

Hi Folks,
Wondering if anyone with a Mil-Spec 1911 (most of us) might measure the width of their barrel lug and pass it on? Have a slide that is seemingly  tighter around the lug than it should be and the lug is hanging up. Want to make sure it is the slide and not the lug that is the problem.
Thank you!
Mike

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1911 lug width Empty Re: 1911 lug width

Post by TomH_pa Tue Sep 21, 2021 11:47 am

If you mean the bottom barrel lug, the GI print calls for .362" +.000" -.004"
The upper lugs are .176" -.000" +.004"


Last edited by TomH_pa on Tue Sep 21, 2021 11:51 am; edited 1 time in total

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Post by Jon Eulette Tue Sep 21, 2021 11:50 am

I have never seen a barrel lug on any milspec pistol be an issue. From memory the bottom lug is approximately 0.365” wide. Take the barrel by itself and see if it will slide into the receiver with no issues. 
Jon
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Post by Jon Eulette Tue Sep 21, 2021 12:01 pm

If anything I would question the barrel link length. It has been common for people to put a longer link in to try and tighten up the barrel fit. This is also referred to as link lock up as opposed to lug lock up. When this is done in many cases you actually get binding because the link is actually too long for the transition over the slide stop pin.
Jon
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Post by james r chapman Tue Sep 21, 2021 12:02 pm

I’m somewhat confused if the OP is referring to the upper lug(s) or lower lug.
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Post by watercam Tue Sep 21, 2021 12:12 pm

You are correct in that I was not more specific for which I apologize. The upper lug is what I was looking for. The slide that I have is .011" narrower than it is supposed to be based on above measured upper lugs.
Thanks one and all, I have what I need to progress!
Mike

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Post by Jon Eulette Tue Sep 21, 2021 12:17 pm

Typically the only critical dimension is from the breech face to the first slide lug (rear edge). Everything else there has quite a bit of clearance and not critical and will not interfere. Is this a match fit barrel?
Jon
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Post by WesG Tue Sep 21, 2021 2:37 pm

Locking lugs, or the hood?

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