Problems with m1 Carbine (hope this is the correct place to post)

[W5USMC]

Any more information you need?

What manufacturer made your carbine?

New problem is I am getting random misfires where the firing pin will hit the primer but not hard enough to fire the round.

Light primer strikes can be caused by a number of issues ie.., short firing pin, weak hammer spring, gummed up bolt, deformed firing pin, excessive headspace, action not fully closing (See jimb16 post #6 and #11), binding of the hammer within the trigger housing, broken firing pin.

Information

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[USGI]

binding of the hammer within the trigger housing

I had that one happen to me. It was caused by too much gap between the TH and the cut-out in the stock. The trigger pin would back out enough to allow the trigger or sear to cause the hammer to bind. Had to make a slightly longer trigger pin to get it working again. - Bob

[DaveHH]

Take a close look at the tip of the firing pin under magnification. Some are so worn and broken at the tip and yet look fine. There is usually a reason why a part is no longer in the carbine. The F.P. is one of the more troublesome parts in a carbine. Lots of trouble with heat treating.

[mchatcommander]

I have some more pictures and I think the manufacturer.

I do have the firing pin tool and I can look at that, I have taken it apart before.

So in the manufacturer location below the rear site it says.
It is a National Ordinance.

[AFJon]

OP
some background material for you

Commercial Carbines
M1CarbinesInc.com

National ord
National Ordnance