Serial numbers after this have noticeably less steel cut away in the bolt raceways after of the cartridge clip guide.Ġ02884 to 010048Ět some point in this serial number range, the receiver design was changed to incorporate a hemispherical cut in the windage knob ear outboard side (commercial NM rear sight).Ġ02903 Lowest documented serial number (complete rifle) shipped from Springfield Armory, Inc. in Texas.Ġ02884 Receiver heel rear end wall centerline thickness is 5/16 “. located in Geneseo, IL.Ġ02877 Highest documented serial number (complete rifle) shipped from Springfield Armory, Inc.
It remains so to the present day.Ġ02010 Receiver left side connector lock hole is still missing.Ġ02068 Receiver left side connector lock hole reappears for good.Ġ02709 Lowest known serial number (stripped receiver) sold by SA, Inc. becomes the casting supplier of M1A receivers.Ġ01977 The receiver bolt right lug slot is fully extended to the windage knob ear. The rear end of the M1A receiver bolt right lug slot, located under the rear sight base cover, was extended 0.080 " to the rear to prevent possible damage to the bolt roller.Ġ01XXX to 002XXX Gray-Syracuse, Inc. Receiver heel rear end wall centerline thickness is ¼ “.Ġ00377 Highest observed serial number with 7.62-MM marking on the receiver heel.Ġ00411 Lowest observed serial number with 7.62-mm marking on the receiver heel.Ġ01329 Valley Ordnance Co. Smith purchased Hillside Manufacturing.Ġ00011 Receiver left side connector lock hole is present.Ġ00049 Receiver left side connector lock hole is missing. For example, the magazine well on M1A receivers was cut and broached by machine tool after Mr. As Melvin Smith moved to semi-retirement the receiver surfaces noted above were finished by machine. Note that the hand polishing served to enhance the aesthetic appearance but did not add to the functional ability of the M1A receiver. This cosmetic detailing is evident as late as M1A serial number 062857 but was no longer being done by serial number 064922.
Specifically, these areas were: 1) the exterior heel corners on the sides 2) the flat surface aft of the operating rod channel 3) the top surface of the left receiver wall from the cartridge clip guide to the barrel ring 4) the vertical surface on the right side behind the cartridge clip guide all the way back including the windage knob ear 5) the left side of the barrel ring forward of the horizontal scope mount groove 6) the magazine well aft of the feed lips and 7) the top surface of the barrel ring after all machining operations that located off the barrel ring had been done. were given a lot of hand grinding and polishing by Melvin Smith. An additional 120 rifles were built for Elmer Bal lance by Glenn Nelson and Wayne Young before June 1974 using stripped or barreled receivers supplied by Elmer.Ġ00001 to 063XXX Receivers machined by Valley Ordnance Co. in Texas assembled about 2000 complete rifles using USGI parts before it was sold to Bob Reese (Geneseo, IL). M1A Serial Number ChronologyĠ00001 to 003700 Texas era receivers tend to exhibit one or more dimensional flaws as identified by retired M14 gunsmith Art Luppino.
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