Milled rear sights with C or CH on bottom

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   There is a contract for "Carbine Sight Bases" that was awarded during January 1945 and final delivery was in March 1945
This is about a year after the adjustable rear sights were adopted. 

We know ordnance was pushing to update the rear sights in the field and there are several articles by Don Hillhouse of the earliest reporting of field upgrades. These were in the newsletters and more findings published below.

http://www.uscarbinecal30.com/forum/89th-chemicalmortar-div-adjustable-rear-sights_topic3983.html

http://www.uscarbinecal30.com/forum/1st-infantry-division-adjustable-rear-sights_topic2829.html

We know Hemphill was making milled adjustable rear sights for Inland marked H.I.  and Winchester H in shield. 

Packard was making milled rear adjustable sights marked PI

Springfield Armory made, or contracted adjustable milled rear sights, but unclear when. 

Some Hemphill and SA sights have been reported with a C or CH on the bottom of the rear sight.

We are asking everyone to check their milled adjustable rear sights and report the bottom marking as well as any manufacturers marks on the left or right side

If you turn a carbine upside down you should be able to see the marking with over head lighting. A flashlight may be easier

If you sight is on a late carbine and appears original, please share the serial number as well. 

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Dan's Notes Members Profile Send Private Message Find Members Posts Add to Buddy List Recruit Joined: Jun 21 2025 Status: Offline Points: 9	Post Options Post Reply Quote Dan's Notes Report Post Thanks(0) Quote Reply Topic: Milled rear sights with C or CH on bottom Posted: Jun 28 2025 at 7:29pm
	There is a contract for "Carbine Sight Bases" that was awarded during January 1945 and final delivery was in March 1945 This is about a year after the adjustable rear sights were adopted. We know ordnance was pushing to update the rear sights in the field and there are several articles by Don Hillhouse of the earliest reporting of field upgrades. These were in the newsletters and more findings published below. http://www.uscarbinecal30.com/forum/89th-chemicalmortar-div-adjustable-rear-sights_topic3983.html http://www.uscarbinecal30.com/forum/1st-infantry-division-adjustable-rear-sights_topic2829.html We know Hemphill was making milled adjustable rear sights for Inland marked H.I. and Winchester H in shield. Packard was making milled rear adjustable sights marked PI Springfield Armory made, or contracted adjustable milled rear sights, but unclear when. Some Hemphill and SA sights have been reported with a C or CH on the bottom of the rear sight. We are asking everyone to check their milled adjustable rear sights and report the bottom marking as well as any manufacturers marks on the left or right side If you turn a carbine upside down you should be able to see the marking with over head lighting. A flashlight may be easier If you sight is on a late carbine and appears original, please share the serial number as well.

Jond41403 Members Profile Send Private Message Find Members Posts Add to Buddy List Hard Corps Joined: Feb 21 2021 Location: East Tennessee Status: Offline Points: 874	Post Options Post Reply Quote Jond41403 Report Post Thanks(0) Quote Reply Posted: Jun 28 2025 at 9:55pm
	My spare, loose SA marked rear sight has no letters on the bottom. Adjustable PI marked rear sight on my carbine has nothing on the bottom of it either.hth

painter777 Members Profile Send Private Message Find Members Posts Add to Buddy List Hard Corps Joined: Feb 18 2016 Location: Central MI Status: Offline Points: 2352	Post Options Post Reply Quote painter777 Report Post Thanks(0) Quote Reply Posted: Jun 29 2025 at 2:08pm
	Have seen Small Shield H with C and another with CH. Could the C mean made by Crescent Manufacturing Freemont, Ohio for supply? CH, made by Crescent for Hemphill contract? *Remembering the SC marked bottoms on Stan Pro Flip Site Bases. Ch-P777
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New2brass Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Dan Pinto, How Can I help Joined: Nov 29 2015 Location: CCC Status: Offline Points: 5527	Post Options Post Reply Quote New2brass Report Post Thanks(0) Quote Reply Posted: Jun 29 2025 at 5:47pm
	Charlie, I do not believe the C stands for Crescent. The H may be Hemphill, and why I am asking guys to check all the milled sights.
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painter777 Members Profile Send Private Message Find Members Posts Add to Buddy List Hard Corps Joined: Feb 18 2016 Location: Central MI Status: Offline Points: 2352	Post Options Post Reply Quote painter777 Report Post Thanks(0) Quote Reply Posted: Jun 29 2025 at 9:07pm
	OK......
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krag96 Members Profile Send Private Message Find Members Posts Add to Buddy List Recruit Joined: Oct 03 2024 Location: central PA Status: Offline Points: 39	Post Options Post Reply Quote krag96 Report Post Thanks(0) Quote Reply Posted: Jun 30 2025 at 8:59pm
	I have two carbines with the adjustable milled sight, neither have any marking on the under side of the rear ledge that I can find. The Underwood has the stamping for Inland on the right side front of the knob. The NPM has a P l stamped front of the knob.

Skippy Members Profile Send Private Message Find Members Posts Add to Buddy List Recruit Joined: Feb 20 2025 Location: PNW Status: Offline Points: 74	Post Options Post Reply Quote Skippy Report Post Thanks(1) Quote Reply Posted: Jul 09 2025 at 11:36am
	Type II Milled Small Shield / H sight, stamped C on the bottom. The sight is not original to the rifle.