Question On Springfield M2 Sight Aperture
What's the correct aperture/sight disc diameter for the Lyman 48C supplied on the Springfield M2 .22LR training rifles? My M2 came to me with a 1/2" screw-in aperture but I'm not sure it's the correct diameter aperture as supplied new by Springfield. TIA for your help.
I just measured a couple of mine and they were both 11/16th's.
Reading up on the Lyman 48 sight in Old Gunsights - A Collector's Guide, 1850-1965 by Nick Stroebel I found the following reference to the diameter of the sight disc, "Any eyepiece from 0.3125 to 1.00 inch would be supplied by request, but the standard disc supplied with most  sights was 0.6875-inch in diameter." 11/16th's decimal equivalent is 0.6875-inch
Anyone happen to know, other than a gun show, where I might acquire a Lyman 0.6875-inch sight disc?
Last edited by Jay Johnson; 08-07-2012 at 07:09.
You might try Aperturesnmore: http://www.aperturesnmore.com/produc...&categoryId=10
They list a 1/2 and 5/8" , but they make them so I don't believe it would be any problem for them to make a 11/16". Their prices and customer service are excellent.
The sight discs are, or at least recently were, available from Lyman. I suggest you give them a call. They show up fairly often on the gunbroker and ebay auctions. I would do a search there for Lyman Sight. Some sellers may not know that it is a Lyman item. A search for simply "sight disc" or "sight aperture" might yield results.
Last edited by Herschel; 08-07-2012 at 11:55.
I hunt with my M1922, and find the aperture to be a handicap. So I took it off, took off the buttplate and put it in the profiling lathe hole. If you have an M1922 with a missing aperture, look under the buttplate.
5/8 = 10/16. Isn't that close enough? Special order will cost more, not worth 1/16"!
Originally Posted by Dollar Bill