Is any-one, please, able to tell me what is special about a Self Loading Rifle fitted with a Double Aperture Rear Sight and who may be have been issued with a SLR fitted with such sights if such a thing exists. The way the rifle was described it sounded as if it was unusual. My limited contact with SLRs comes from the Cadets which was years ago and, working from memory, they had a 2 position flip sight. Thank-you for any information.
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