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6/26/2026 4:49:15 PM EDT
Found a m2 50 cal barrel in my hoard. Its new old stock.  Unfired since being proofed. It is marked D28253A-9  also has a "D" stamp before the D28253A-9  and a "K" after there is a larger "253" stamped on  the thickest part.. my question is what do I have and what is it worth? The breech end is threaded.
6/26/2026 5:57:09 PM EDT
[#1]
Should be a standard M2 HB (Heavy Barrel).
The -9 is an older revision of the drawing number.

I’m getting Google hits suggesting an unlined (so not chrome lined) barrel, probably from WWII.
6/26/2026 6:23:48 PM EDT
[#2]
Quote History
Originally Posted By KitBuilder:
Should be a standard M2 HB (Heavy Barrel).
The -9 is an older revision of the drawing number.

I’m getting Google hits suggesting an unlined (so not chrome lined) barrel, probably from WWII.
View Quote



The chamber most definitely looks to be chromed.
6/26/2026 6:45:46 PM EDT
[#3]
Quote History
Originally Posted By eyeson:
The chamber most definitely looks to be chromed.
View Quote
It may very well be.

Strangely I’m not finding any good info explaining the -#s in the drawing revisions explaining what changed and when.
They switched to Stellite liners too, at some point.

This has a photo showing a chrome lined one: https://www.1919a4.com/threads/m2-heavy-barrel.116518/
6/26/2026 9:05:28 PM EDT
[#4]
Originally Posted By eyeson:
Found a m2 50 cal barrel in my hoard. Its new old stock.  Unfired since being proofed. It is marked D28253A-9  also has a "D" stamp before the D28253A-9  and a "K" after there is a larger "253" stamped on  the thickest part.. my question is what do I have and what is it worth? The breech end is threaded.
View Quote


Wish I could just find unfired M2HB barrels like that…..
“Don't post anything here or send anything you aren't willing to defend in court.”

-Notcalifornialegal
6/29/2026 7:13:39 PM EDT
[#5]
Quote History
Originally Posted By prebans:


Wish I could just find unfired M2HB barrels like that…..
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You can find one in the EE.

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