Bought a complete set up National Match "Everything" Rare

[Cosine26]

Hi 2111
How do you identify that as an M14 Hammer? Just curious.
I have a NM M1 Trigger group that came off a 1962 or 1963 NM M1 that has a HR hammer. It is the TG that I asked about in another post.
The big difference that I see is how it is annotated.
On the NM TG it is marked :
HRA 5546008
The spare M1 hammers that I have are marked:
5546008 HR A or G
In the first case the HRA is before the part number and in the second case the HR follows the part number with either an "A" or "G"
FWIW

[2111]

Based on everything I have read HRA produced two hammers for the M1 Garand that were used in regular production. HRA 5546008 which is the most common and 5546008 HRA N usually found on late HRA rifles along with the HRA 5546008.

Those marked HR A or G were made after M1 production had ended and were used by HRA in the M14's they produced. I would suppose that HRA also had a contract for spare parts, hammers included, but I don't know that for a fact.