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M1 carbine reciever leg |
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Stewman
Recruit Joined: Jul 28 2017 Location: California Status: Offline Points: 3 |
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Posted: Aug 04 2017 at 4:40am |
Ghostman
On Point Joined: May 31 2016 Location: Virginia Status: Offline Points: 106 |
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It actually doesn't look to bad, maybe reparkerize. I'm no Engineer, but all that part of the receiver does is hold the trigger assembly on. No danger of it exploding in your face or other safety issues that I could foresee! It's the opposite end of where the pressure could work on it! I'd leave it alone and enjoy the carbine!
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sling00
Hard Corps Joined: Apr 21 2016 Location: Tennessee Status: Offline Points: 941 |
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First...Welcome to the forum! I found in Kuhnhausen's Shop Manual, pg 84 it discusses broken lugs were probably caused by trying to bend the lug or dropping the receiver on a concrete floor. He has a note regarding successfully repaired rear lugs. (1) Preheat receiver to 400F, (2) TIG weld filling areas with 4130 rod, (3) remachine areas. It also states without reheat treating weld transitions and fill areas typically remain after reparkerizing. It's kind of early in the morning, but if I have this pictured in my mind correctly, the only forces I can think of on the lug are when the bolt retracts and is cocking the hammer. Once cocked, there is no force other than the weight of the trigger housing assembly.
Based on my simplified thoughts, I tend to agree with Ghostman to leave it alone and have fun. There are other forum members with metal working skills who can really help out on this question.
Thanks for asking and I look forward to seeing the replies. |
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manteo97
On Point Joined: Jan 15 2016 Location: Victoria, B.C. Status: Offline Points: 61 |
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I have welded a front tang back on a receiver (flux core with preheat), with no detrimental results. Tang was broken off when a "gunsmith" tried to remove a barrel. I also have a receiver with the front tang brazed back on. No loss of hardness in the receiver ring area. Again, no real problem.
Welding of any kind should not be attempted in trying to put a torch/saw cut receiver back together (ie a re-weld), or a cracked receiver ring (due to over-tightening a barrel). Stewman, you are probably just fine with this repair on the leg here. It's not a TIG weld (preferred), and not an attractive weld, but functional consider the area it's in on the receiver. Ted |
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floydthecat
Hard Corps Joined: Oct 13 2016 Location: Mississippi Status: Offline Points: 1996 |
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As Ted would surely know, some of the commercial carbine manufacturers welded gas blocks on barrels and front lugs on receivers. Iver Johnson modified and used thousands of forged steel receivers left-over from the acquisition of Universal. They converted those dual-spring receivers to single-spring receivers by replacing the front lug, which they brazed in place. I have one of those. It's a regular shooter and has not fell-apart....yet.
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sling00
Hard Corps Joined: Apr 21 2016 Location: Tennessee Status: Offline Points: 941 |
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Thanks manteo97 for your help. I was hoping you would see this post.
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m1a1fan
Hard Corps Got Para? Joined: Jan 01 2016 Location: Virginia Status: Offline Points: 1736 |
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Have seen some pretty bad weld jobs on torch cut receivers. Scary bad. Have seen one receiver leg weld job in person but did not get a picture. It was perfect and the person that did it knew what they were doing.
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sling00
Hard Corps Joined: Apr 21 2016 Location: Tennessee Status: Offline Points: 941 |
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I was glad to see Kuhnhausen's Shop Manual describe how to repair them. That's a good thing to know if you ever break one or find a real deal on one with a broke lug.
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Stewman
Recruit Joined: Jul 28 2017 Location: California Status: Offline Points: 3 |
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shadycon
On Point Joined: Mar 16 2016 Location: NRV, Va. Status: Online Points: 145 |
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Now that look great! Good job!!
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M1's are FUN!!!
TSMG's are more FUN!!! |
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W5USMC
Moderator Group Joined: Apr 29 2017 Location: Missouri Status: Offline Points: 2949 |
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Wow, hard to believe that was the same receiver. Really good job.
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Wayne
USMC Retired NRA Life Member |
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cali201
Grunt Joined: Jan 01 2016 Location: Atlanta Status: Offline Points: 198 |
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Nice job
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m1a1fan
Hard Corps Got Para? Joined: Jan 01 2016 Location: Virginia Status: Offline Points: 1736 |
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Spot on....Great job!
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manteo97
On Point Joined: Jan 15 2016 Location: Victoria, B.C. Status: Offline Points: 61 |
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Outstanding job! TIG always best way to go, as it keeps heat input into the parent metal to a minimum.
What filler rod (alloy) did you use? |
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Stewman
Recruit Joined: Jul 28 2017 Location: California Status: Offline Points: 3 |
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Er80-2 for the filler.
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