New No.4 Mk1 owner... what can you tell me about my rifle (pics)

[owengun]

As per the OP's original question, and as per Ian D. Skennerton,-

"No.4 and No.5 rifle serial numbers can readily identify manufacturers. British No.4 rifles have five numbers, usually after one or two letter prefixes. The same letter prefix(es) were used by Maltby, Fazakerley & BSA Shirley, A to Z then AA, AB to AZ, then BA to BZ, CA to CZ &c. Maltby rifle serial numbers commence with a number '1', Fazakerley with a '2' and Shirley with a '3', e.g. 1xxxx for Maltby, 2xxxx for Fazakerley and for Shirley, 3xxxx, after the letter prefix. Late Shirley numbers then supposedly ran A4000 to A7999 and with PS prefixes at the very end of production. Post-war Fazakerley No.4 rifles had PF letter prefixes."

So going by your your rifle's serial number it was made by Fazakerley and 1942 sounds about right. The rifle was then at some point put through a post war rebuild which explains the Suncote finish and as was common, the use of serviceable mixed parts from stock to complete the rebuild without thought of making it all matching for later civilian collectors of these rifles, just like Garands were.

It also saw service as was previously noted with the Canadian military. It should be a good collector piece and I would not be too worried about the mix of parts as it shows that it had a useful life which is why it required a rebuild and also most certain war use.