What Serial Range Is This HP Barrel For?

[Jr.]

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Picked up this nice condition HP barrel and unsure what serial range it is for. First one I've seen with a small G and and unside down K.

Thanks for the input!

Information

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[Scott Gahimer]

1918-1919 M1911 in an approximate serial range 400000-629500.

[Jr.]

Thanks Scott,

First time I had ever seen a small G on an interlaced HP barrel before not to mentioned that upside down K. Have you ever seend this type barrel before?
I know what the G stand for but want does the K refer to, a inspector marking? Sorry but I'm learning.

Jr.

[Scott Gahimer]

Both markings on M1911 barrels are simply production markings. The G and K on this barrel are markings that were assigned to someone doing a step of production or in-house inspection.

When it comes to M1911A1 barrels, the small and large G indicates the barrel was made to satisfy a Government contract. But on the earlier M1911 barrels, that wasn't the case.