IBM Markings
Printed From: The Carbine Collector's Club
Category: The Club
Forum Name: Parts Markings
Forum Description: Questions and Answers
URL: http://www.uscarbinecal30.com/forum/forum_posts.asp?TID=4993
Printed Date: Apr 19 2024 at 9:44am
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com
Topic: IBM Markings
Posted By: painter777
Subject: IBM Markings
Date Posted: Oct 27 2020 at 6:29pm
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Seen this on GB today. IBM 3,709,586 IBM Barrel markings look like a mess. After seeing the Barrel markings... And Especially what appears to be the turned down area / diameter on the barrel to the rearward position of the Frt sight. Picture makes it Appear the the Frt sight is all the way back, but looking at another picture from a distance you'll see it isn't. Is it just me ? Or is it the pictures that make the Frt sight look as though it's the correct diameter to the rear of the Frt sight and keyway, BUT then steps up to a bigger diameter, before getting to the full diameter of the barrel. Is this a real IBM barrel with just another Messy stamping job like seen on others. I see no markings on the barrel flat.   Is the muzzle end milled to 2 different diameters before getting to the full barrel diameter? It appears the forward area that the Frt sight and keyway are on is a smaller diameter than directly behind them.   P stamped ahead of the added Bayo band  Also noticed and wanted to ask if it's common to see a letter marking here on a IBM ?  Gas Cylinder  1- Is the Barrel real ? 2- Is the front of the barrel 2 different diameters ? Before getting far enough back to the full diameter barrel. 3- Is the letter marking on the receiver cross bridge common on IBM's ? Hope you can follow my screwed up descriptions, I'd give a $100 to put a Mic on this barrel front. Ch-P777 ------------- Living Free because of those that serve..... |
Replies:
Posted By: jackp1028
Date Posted: Oct 27 2020 at 7:02pm
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Pic #3 looks like the barrel band is slid up against the front sight. Barrel looks okay to me. ------------- JackP |
Posted By: hunterman
Date Posted: Oct 27 2020 at 7:14pm
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I agree with jackp1028, the barrel band is up against the front sight in photo 3. Looks fine in photo #4. |
Posted By: W5USMC
Date Posted: Oct 27 2020 at 7:43pm
Yep, JackP is on to something, here is the sideview. ------------- Wayne USMC Retired NRA Life Member |
Posted By: painter777
Date Posted: Oct 27 2020 at 8:55pm
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Picture shows a slight recess between the rear of the Frt sight and the ridge just touching the lead key. At this point you can see the OD of the Frt sight (ring) looks equal OD to the Ridge touching the lead key. You could lay a straight edge on it at this point. Then the ridge that's touching the lead key travels back to the rear ridge where the barrel becomes the full diameter size. Have you ever installed a Frt sight back far enough to touch this ridge ? I understand a Bayo band would slide forward to the back of the Frt sight. Picture from M1A1fan,  ------------- Living Free because of those that serve..... |
Posted By: New2brass
Date Posted: Oct 27 2020 at 9:16pm
 I think you are seeing the IBM barrel notch Take a look at the datasheet  ------------- http://www.uscarbinecal30.com/forum/club-assistance-saginaw-receivers_topic4716.html" rel="nofollow - Club Survey Saginaw Receivers |
Posted By: painter777
Date Posted: Oct 27 2020 at 9:47pm
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Let me put it like this... In this picture: Does the Barrel in front of the Sight looks the same OD as behind the sight ? ------------- Living Free because of those that serve..... |
Posted By: painter777
Date Posted: Oct 27 2020 at 10:03pm
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Jeeze, I'm an Idiot. You guys spelled it out but I was convinced It was something different. It just now dawned on me what you were telling me: The Type III Bayo Band is slid forward against the Frt Sight, Then the Picture was taken !!! I'm here thinking Surely these guys can see that the barrel is less OD in Frt of the Sight and Larger OD in back. What can I say ?  That's what I deserve for picking out problem carbines all day on the auctions. Appreciate the helpful insight gentlemen even if it took most of my evening trying to point out something that wasn't there. Your a good bunch ! Ch-P777 ------------- Living Free because of those that serve..... |
Posted By: 1989LX
Date Posted: Oct 28 2020 at 1:14pm
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Hey, it happens. I wouldn't sweat it too much. ------------- USGI magazines are like potato chips, you can't have just one! |
Posted By: painter777
Date Posted: Oct 28 2020 at 7:40pm
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Thx 1989LX, I'm still curious as to the Nasty Stamping job on that barrel. Ch-P777 ------------- Living Free because of those that serve..... |
Posted By: 1989LX
Date Posted: Oct 29 2020 at 2:31pm
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Truth be told, I wonder what is up with that too. Even though I've only been on the mortal plane 21 years and been into carbines since I was probably 5 or 6, I've never seen that crude or messy, whichever word you want to use of a stamping job on a barrel personally. ------------- USGI magazines are like potato chips, you can't have just one! |