This is for British, Aust and possibly Canadian
L1A1 owners. If you have the figures 4 and/or 7stamped into the tang (the extension underneath wher the butt screw goes through into the butt) of your trigger mechanism housing, this is an Armourers easily identifiable marker that two modifications have been carried out. It also tells him that he doesn't need to strip the rifle to know that they've been done.
The 4 indicates that the rifle has a two-piece firing pin fitted to the breech block
The 7 indicates that a modification has been done to the return spring screw so that when you unscrew it with that special rodded screwdriver thing, the screw won't unscrew the whole return spring tube from the trigger mechanism housing.
There, just another bit of Enfield info that I thought that you'd like to know about, especially if you've got one marked with the 4 and/or 7Information
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