Thompson M1 bolt variation

[Annihilator]

Dear all

i have never seen this M1 bolt variation. It came packed in Cosmoline with an inspection tag dated september 1954

[Bridgeport28A1]

They are sometimes referred to as “sand bolts”. They also are found in the “bright bolt” finish type.

Good to know me they were an accepted configuration in 1954.

Edited July 10, 2025 by Bridgeport28A1

[Mk1992]

On 7/10/2025 at 9:00 PM, Bridgeport28A1 said:

They are sometimes referred to as “sand bolts”. They also are found in the “bright bolt” finish type.

Good to know me they were an accepted configuration in 1954.

Do you mean these bolts was made during post war periods?

[Bridgeport28A1]

No, they are WW2 production bolts.
 

If it had a 1954 date on the wrapping it was likely inspected and stored as ordnance spare parts. 

[gijive]

I agree with Bridgeport28A1.  These are WWII bolts that were inspected and placed in long term storage in 1954.  Many of the Thompson parts seen over the years have early 1950's dates on them.  It may have something to do with the Korean War.

[full auto 45]

40 minutes ago, gijive said:

I agree with Bridgeport28A1.  These are WWII bolts that were inspected and placed in long term storage in 1954.  Many of the Thompson parts seen over the years have early 1950's dates on them.  It may have something to do with the Korean War.

Much like many of the wrapped XXX mags will have a early to mid 50's date on them. Usually 53, 54 or 55. After Korea, greased up and wrapped for future military use. 

[Chip]

Were these bolts manufactured that way originally, or were they modified later?  This one is a Savage M1.