With regard to my SPF L1, it is in excellent condition, showing very little signs of use prior to deactivation, its one of a batch brought to the UKfor sale to civilian service rifle shooters, this one was Birmingham proofed in 1987 ... Just in time for nut job Michael Ryan to go on his murderous rampage, after the ban it was deactivated (1989). I guess fitted with Enfield made plastics when imported.