M1D Armourer Instructions, anyone have them?

[Roy W]

Does anyone have a copy of the Armourer instructions for fitting the M1D kit in the field? In particular showing what needs to be done to the barrel?

Many thanks

Information

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[Tom in N.J.]

I don't have the Instructions you are looking for, but I can tell you if it is a GI barrel all you have to do is screw it on and head space. The scope mount mounting block was assembled to the special barrel at the armory.

[Jakeroub]

I don't have the Instructions you are looking for, but I can tell you if it is a GI barrel all you have to do is screw it on and head space. The scope mount mounting block was assembled to the special barrel at the armory.

Yes, the D takes a different barrel. Remove the old and install the D barrel. They would have needed to be reamed to proper headspace as well.

[Roy W]

Its to convert a standard barrel to take a mount block?

[browningautorifle]

Its to convert a standard barrel to take a mount block?

I only ever had one in hand and the only difference was the barrel had been machined back so the shank was longer. That is, to allow the block to be slipped on and crushed between the barrel and receiver. You could fit a block to a standard barrel if you were careful.

[Roy W]

thanks

I thought I had read somewhere that kits were issued to Armourers to convert rifles in the field. I am sure I once saw a pamphlet with the machining details, but may be mistaken

[Jakeroub]

The kit would have included the M1D replacement barrel with block pre-installed.

The vast majority of M1Ds are with the “555” M1D specifically machined barrels. However, there have been a few that came from the CMP with the standard “448” part number. Those were obviously standard barrels that were converted by someone. Springfield Armory??

[Roy W]

Many thanks

[Mark in Rochester]

There was a documented U.S.M.C. procedure for converting a rifle to an M1C Configuration. Have a copy somewhere.

[Jakeroub]

That can’t be right. M1Cs were only made at Springfield Armory. The receivers were drilled and tapped before heat treating.