barrel marking d6535448-41-md16 sa-6-51
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barrel marking d6535448-41-md16 sa-6-51
If you mean M1D, I don't believe so. The barrel marking should end in 555 not 448.
A picture or two would help but the drawing number 35448 is for the standard M1 barrel.
Most M1D barrels were made on special production runs. They were marked D7312555 on the top of the barrel. The rear handguard usually must be removed to see this mark.
At least one reference shows the drawing number visible on the side of the barrel when the operating slide was pulled to the rear. In the photograph that i saw though the number appeared to have been "messed with".
Regards,
Jim
I have seen M1D barrels made up with commercial sight blocks by turning down a standard issue (D 653448). I do not know if the Army made any that way. I have two M1D rifles, both have barrel drawing number D 7312555, one is marked on the top, and one is marked on the right side.