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Saginaw S’G’ Receiver Modification |
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Skippy
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Joined: Feb 20 2025 Location: PNW Status: Offline Points: 74 |
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Topic: Saginaw S’G’ Receiver ModificationPosted: Jun 01 2025 at 1:19am |
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Please see the photo below. The receiver has been “tapped
and screwed”. Has anyone seen this done to carbine receiver before? Any information
would be appreciated.
This carbine is a Saginaw S’G’ mixmaster with a serial number 3,622,xxx. It has a 12/43 dated Underwood barrel which seems OK based on the data in the carbine spreadsheets. Headspace is good – bolt closes on a “go” gauge and won’t close on the “no go”. Checked the barrel to receiver timing with levels and timing is OK. The bolt and operating slide run true and function smoothly. It’s a shame someone did that to a nice S’G’ receiver.
"Mixmaster carbines are like a box of chocolates. You never know what you're gonna get," - Forrest Gump |
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New2brass
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Dan Pinto, How Can I help Joined: Nov 29 2015 Location: CCC Status: Offline Points: 5527 |
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Posted: Jun 01 2025 at 6:39am |
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My WAG, the barrel was loose or not timing, so the screw is holding the barrel in place/rotation
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welbytwo
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Advanced Collector Joined: Jan 01 2016 Location: Indiana Status: Offline Points: 931 |
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Posted: Jun 01 2025 at 10:29am |
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one of scope mounts mounted there
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New2brass
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Dan Pinto, How Can I help Joined: Nov 29 2015 Location: CCC Status: Offline Points: 5527 |
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Posted: Jun 01 2025 at 11:05am |
Good call! Did that one screw into the dovetail?
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jackp1028
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Joined: Jan 01 2016 Location: Cloudcroft, NM Status: Offline Points: 1450 |
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Posted: Jun 01 2025 at 11:47am |
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We've seen this before. It looks like this carbine once sported a Numrich Arms Co. "U.S. Carbine Scope Mount". Here's a link to a thread that tells the whole story.
http://www.uscarbinecal30.com/forum/rockola-find-questions_topic7452_post63556.html?KW=weaver#63556 |
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JackP
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New2brass
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Dan Pinto, How Can I help Joined: Nov 29 2015 Location: CCC Status: Offline Points: 5527 |
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Posted: Jun 01 2025 at 11:57am |
![]() ![]() Thanks Jack! I cannot remember everything. Seems the rear goes in dovetail and screw hits bottom of dovetail forcing the mount to the top of dovetail to secure in place. This may leave a mark inside the bottom of the dovetail |
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Skippy
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Joined: Feb 20 2025 Location: PNW Status: Offline Points: 74 |
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Posted: Jun 01 2025 at 3:20pm |
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The scope mount is the answer. You can see the scope screw mark inside the bottom of the dovetail.
Thank you for helping with this. I really appreciate it. |
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Skippy
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Joined: Feb 20 2025 Location: PNW Status: Offline Points: 74 |
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Posted: Jul 09 2025 at 11:49am |
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I located a Numrich Arms Co. U.S. Carbine Scope Mount and it
matches with the mounting screw marks on the receiver.
Does this mean that my carbine is now “correct”? |
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