Mystery MB mark? cmp 1911

[DDRode]

Originally Posted by tazaroo

MB if stamped on a Colt barrel stands for "Match Barrel".

[Mark1]

The following is the Military Acronym for MB, but if MB are someones initials than the acronyms do not apply.


MB Maintenance Branch

MB Media Bureau (Federal Communications Commission)
MB Molecular Biology
MB Management Board
MB Military Base
MB Monza e Della Brianza (Italian province)
MB Ministerieel Besluit (Dutch: Ministerial Deree; Belgium)
MB Moscow Bound (Vietnam POWs)
MB Main Base
MB Military Budget
MB Marine Base
MB Military Bank
MB Magnetic Bearing
MB Marine Barracks
MB Maintenance Burden
MB Marker Beacon
MB Medium Bomber
MB Military Brat
MB Mechanized Brigade
MB Marine Battalion
MB Maintain Benefits
MB Manned Base
MB Measurement Base
MB Mossbauer Spectrometer (NASA)
MB Missile Battalion
MB Military Battalion
MB Ministerstvo Bezopasnosti (Russian Security Ministry)
MB Missile Bomber
MB Magazijnbeheerder (Dutch)
MB Willys-Overland 1/4-Ton 4x4 Truck (WWII Jeep)

[ZvenoMan]

I read those links. They show discussion and speculation just like this thread. They even say it is speculation.
Here are some facts:
MPI is clearly used on some USGI small arms to indicate magnetic particle inspected
1911s have a documented history of various marks indicating inspectors and rebuilds, even unit and rack marking

Not a fact, but it seems reasonable to expect some documentation indicating that MB refers to an MPI if such were the case.
Perhaps such documentation will surface, documentation linking MB to something else (my bad), perhaps it will remain a mystery for the ages.
Rosebud?

Jh

[jwenum]

Lol, now we’re speculating between M-B and the single A xx xx rebuild marks, that searching about reveals nothing so far, but still intriguing!

[Jakeroub]

Here is a question for those tracking the markings-

Have any M-B marked pistols been seen without the OB rebuild marking? Or, have any M-B marked pistols been seen with a different rebuild marking?

[thebearpack]

Originally Posted by Jakeroub

Here is a question for those tracking the markings-

Have any M-B marked pistols been seen without the OB rebuild marking? Or, have any M-B marked pistols been seen with a different rebuild marking?

Yes, the MB mark has been around for a while whereas the OB mark is new with this release. I'd have to check about other rebuild marks but the info is out on the interwebs.

[cplnorton]

The OB markings have been observed and known for at least 15 years ever since Jeremy Cheek wrote his article. But they have only been found on the M14's heels like the 0-6X program until this M1911 release.

All available evidence points to Overhauled Barstow and then the year, is the meaning of the mark.

The thought is Barstow switched to marking them OB instead of just the standard O right around 1970+/-, to denote which facility they were rebuilt at.

[TW56]

From the initial CMP 1911 pistol release, an electro pencil OB 79 with a M-B stamp near the "Ordnance Wheel" stamp. A thank you to cplnorton for his ongoing research regarding USMC small arms.






TW56
A family members early black hard case pistol which is NOT for sale.

[RJT128]

My CMP pistol (R 244181X) came with the MB stamp on the frame, slide and barrel:


Frame and slide: in the sunlight, you can see that it is an MB on both.


The barrel stamp is harder to read.

The frame is also electropenciled OB83. It seems most of the images I've been able to track down of the MB (or M-B) stamps have been on pistols with an "O" electro pencil mark on them.

There was another poster who said they had a MB stamped 1911 (M-B slide, MB on frame, marked OB84) as well; links were posted in the picture thread.

In researching what I got from the CMP, this MB stamp is the only thing that has me puzzled...

[TDP0311]

Just a thought, perhaps the M could denote some sort of magnetic test and the B stand for Barstow?