No4 Magazine Markings.

[22SqnRAE]

IanS,

Faz made rifles up to PF, so PA is toward the latter part of the 360,000 post WWII rifles they made at that factory.

Best guess, and that's all it is, would be a Korean vintage rifle, 51-53, say?

M/56 on the platform means the wartime production code given to the parts maker. In this case (C.W. ?) Cheney & Son Ltd, Willenhall. Cheneys were a locksmith company established in the 1920s. The platform and attached spring would have been new old stock from, most likely, wartime (or extending just a few years after )production runs.

The U4 would have been the inspector's mark in the factory that made the mag case.