NO Receiver or Bolt Proof Firing Punch Mark Search

Looking for M1 Carbines and Bolts that are Missing the Punch or Pr!ck mark on them that means they went thru a Proof Firing test before Ordnance acceptance.
The Receiver, Barrel and Bolt are to be marked by the Ordnance Inspector to indicate that they have successfully passed the Proof Firing test with a high pressure M18 proof cartridge. This applies to finished carbines, spare bolts and spare barrels.

Not to be confused with the Rockwell Hardness test smaller pin pr!cks.

A long time member has found: "I have a US&S NPM (U) receiver and a late WRA receiver without proof marks. Both appear to have the original finish. Both appear to have little to no wear from typical use. I also have NPM, Inland and Underwood bolts without proof marks."

Anyone else have a Receiver or Bolt with NO Proof Punch?

To All: Any thoughts to Why no such marking?

Thx For Looking

Bolt and Receiver Proof Firing Punch Pictured

Is it possible to have a couple pictures of the unpunched bolts and receivers?

I don't have them. Reported by JackP.
Would look like the picture above without the Punch on the rear of the receiver and without the Punch on the Bolt near the top of the Extractor.

This older link has some good information posted by Mr Ricca and JMoore about Proof Fired Marks and why Rockwell Hardness tests are NOT on top of a Bolt. JMoore also explains the size of Hardness Prick Marks. Which should avoid confusion with the larger Proof Fire Punch Mark.

https://www.milsurps.com/showthread.php?t=40320

Please look your Carbine Receivers and Bolts over to see if they have the larger Proof Fired Punch Marks and report back.

Also share your thoughts if you have any as to why these markings would be missing.

Thank You

There is a picture of the subject NPM receiver and bolt on the Carbine Collectors Club Forum here.

Receiver Proof Marking - The Carbine Collector's Club

Here's a EMB Round Bolt for a IBM that appears to have no Firing Punch Mark. Ebay Auction number 197008706149.
IF the Punch Were there it would be out past the Top of the Extractor.

I know it's hard to remember, But please be on the lookout for Receivers and Bolts WITHOUT the Punch Marks.

Thx :thup:

Attachment 139094

Here's the proof marks on my 3.05M Inland. I've owned this one for 20 years. I bought the EMQ flat bolt at a Portland show in 2010 and installed to reduce the headspace a bit. I don't see any proof mark on this bolt.

The gun has an 11-43 dated Inland barrel with (2) proof P's located 11-3/8" and 11-1/4" from the muzzle. - Bob

Attachment 139095

Thx GI Bob,
I tied a link over on the CCCF in the Parts Markings forum in the Receiver Proof Marking thread. Left you a reply too :lol:

For what its worth my NPM serial #4211XXX has the punch marks.