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Discussion Starter · #1 ·
Just picked up a new bolt for my 1917 LSA No.1 Mk. III. Took the cocking piece and mated it with the existing (fitted) bolt body and bolt head (concerned for headspace).

Here is what I received:


Tool Trigger


Note: The cocking piece is numbered but did not match the bolt body that it came with (I did not break up a matched set).
 

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So what are you looking for in the way of education?
 

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Discussion Starter · #3 ·
Sorry.
What does the 'NS' on the bolthead mean?
What does the 'I' on the cocking piece mean?
And, by keeping the original bolt head and bolt body, will my headspace be (virtually) the same as it was? Ie. the cocking piece does not effect headspace?
 

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As far as I know, the "NS" stands for "Non Standard", referring to the steel of the bolthead. Not sure what the "I" means, and the cocking piece won't affect headspace, but may affect trigger pull.
 

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On an SMLE non-standard usually means some hand fitting was required to make the part fit properly. The NS was also to let the armourer know that some extra work might be involved in repairing the rifle if it should turn up on his bench.
 

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Discussion Starter · #7 ·
Which would explain why the bolt head rotates off the ribway with minimal effort, forward of the charger bridge. I wonder why they took the time to stamp it and hand fit it to a rifle? Why not just dispose of it, it is just a bolt head?
 
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