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As posted above, the 48S was never used on an Armory product, having been introduced after production of the "Sporters". The only correct sight is the short slide option Lyman 48.
The long-slide 48 was used only on a prototype Cal..22 M1922 rife, so does not belong on a Sporter.
The 48B and later 48C were target sights (no turn-down peep) used ONLY on target rifles.
By the way, the headless cocking piece will be a replacement of the issued headed one.
Dear Campbellbook, I do not have a book here to reference. Looking at the photo of the three rifles on the previous page, with two NRA Sporters and a M1922, the rifle in the middle has a longer (READ: taller) Lyman sight. I am assuming, therefore, that is the Lyman 48S ("Which one doesn't look like the others"). Then the ones on the top and the bottom are the NRA sporters since they look the same sight-wise, and the one in the middle must be the M1922.
Looking at my sight, it appears to have the shorter Lyman sight, so it must be a Lyman 48C?
I have no idea what a "turn-down peep" is. Can you educate me?
Here is another pic of my rifle.
Sincerely,
Mark
Mark, the top rifle is the .22 M2, which undoubtedly has a correct 48C.
The middle rifle has a very early 48, the long-slide option, which is NOT correct for the Style NRA rifle (the "Springfield Sporter").
The bottom rifle looks correct except with a substituted cocking piece. The sight looks to be a proper Lyman 48. If it is, it will have a "turn-down peep", which can be turned up to give a smaller peep if wanted when hunting with the aperture disk properly removed.
The long-slide Lyman 48 was sometimes put on a rifle by it's owner to have a slide totally inside and supported by the base when sight elevated for shooting at 1000 yards.