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1911 lug width

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1911 lug width Empty 1911 lug width

Post by watercam 9/21/2021, 9:58 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 9/21/2021, 10:47 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 9/21/2021, 10:51 am; edited 1 time in total

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Post by Jon Eulette 9/21/2021, 10:50 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 9/21/2021, 11:01 am

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 9/21/2021, 11:02 am

I’m somewhat confused if the OP is referring to the upper lug(s) or lower lug.
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Post by watercam 9/21/2021, 11:12 am

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 9/21/2021, 11:17 am

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 9/21/2021, 1:37 pm

Locking lugs, or the hood?

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