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Old 04-07-2019, 10:00 PM
Gewehr43 Gewehr43 is offline
Join Date: Nov 2009
Location: Denver, CO
Posts: 2,835

Ok......I guess I'm curious.
If "MB" is for Magnetic Particle inspection, then why isn't it "MP?"
That is how they are marked on USGI M16 barrels and bolts.
So they spelled it correctly on the rifles but not on pistols?????
I can see it's some sort of inspection mark but not that.

BTW..... both those links end up having the same source (Shooter5) giving his thoughts.
I understand his point but, again, his thoughts were this (the MB marking) may have been done in the 70-80's.
The M16's in the 60's were marked "MP" so if it's the same..... why would it change for the 1911?
Again.... just my WAG but I don't think it's Magnetic Particle inspection.
Service Rifle.... RIP .... 1884-2015

Last edited by Gewehr43; 04-07-2019 at 10:23 PM.
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