WTK who made this receiver

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   Trying to find out who manufactured this receiver.  Three digit serial number, normal style receiver ring markings. GI compatible parts.Recoil spring guide area has interrupted open areas where the spring is visible from bottom of receiver. Has a milled rear sight and the serial number is at the normal serial number location, but is light. No other marks visible underneath the rear sight.  Searched the club sight but I couldn't find anything like it. Thank you, Peter 
Maybe National Ordnance, but doesn't totally fit the look or description ?
Has a Blue Sky import marked Winchester barrel .

Edited by Uzipete - Oct 24 2025 at 9:49pm

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Uzipete Members Profile Send Private Message Find Members Posts Add to Buddy List Recruit Joined: Dec 01 2016 Location: Upstate New Yor Status: Offline Points: 32	Post Options Post Reply Quote Uzipete Report Post Thanks(0) Quote Reply Topic: WTK who made this receiver Posted: Oct 24 2025 at 9:33pm
	Trying to find out who manufactured this receiver. Three digit serial number, normal style receiver ring markings. GI compatible parts. Recoil spring guide area has interrupted open areas where the spring is visible from bottom of receiver. Has a milled rear sight and the serial number is at the normal serial number location, but is light. No other marks visible underneath the rear sight. Searched the club sight but I couldn't find anything like it. Thank you, Peter Maybe National Ordnance, but doesn't totally fit the look or description ? Has a Blue Sky import marked Winchester barrel . Edited by Uzipete - Oct 24 2025 at 9:49pm

W5USMC Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: Apr 29 2017 Location: Missouri Status: Offline Points: 3640	Post Options Post Reply Quote W5USMC Report Post Thanks(0) Quote Reply Posted: Oct 24 2025 at 10:20pm
	Some pictures would be helpful.
	Wayne USMC Retired NRA Life Member

sleeplessnashadow Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: Nov 09 2015 Location: SoCal Status: Offline Points: 1253	Post Options Post Reply Quote sleeplessnashadow Report Post Thanks(0) Quote Reply Posted: Nov 09 2025 at 4:52pm
	Uzipete I'm the author of the info you see on the commercial carbine web pages. National Ordnance, Alpine, and RIA made the type of receiver you described. The 3 digit serial number located on top of the receiver behind the rear sight was only done by RIA. For everything other than the receiver, RIA used whatever surplus was available. Have a look at: http://www.m1carbinesinc.com/carbine_rockisland.html Jim
	Construction builds. One person's mind and efforts can build, but not like that of two or more. Destruction destroys. One person's mind and efforts can destroy, but not like that of two or more.

Uzipete Members Profile Send Private Message Find Members Posts Add to Buddy List Recruit Joined: Dec 01 2016 Location: Upstate New Yor Status: Offline Points: 32	Post Options Post Reply Quote Uzipete Report Post Thanks(0) Quote Reply Posted: Nov 09 2025 at 5:11pm
	thank you, sorry I didn't get any pictures, I will try to see if I can get some