Post WWII production totals: (approx.)

Springfield Armory: 661,747 (from 1952 – 1956)
Harrington & Richardson Arms: 428,600 (from 1953 – 1956)
International Harvester Corporation: 337,623 (from 1953 – 1956)

1952 – 1956 Assigned Serial Number Ranges:

Not Assigned N/A
4,800,001 to 4,999,999

Springfield Armory
1952 – 1954 sn#4,200,001 to 4,399,999
Aug. 1952 sn#5,000,000 to 5,000,500
1954 – 1955 sn#5,278,246 to 5,488,246
1955 – 1957 sn#5,793,848 to 6,099,905

International Harvester
1953 – 1954 sn#4,400,000 to 4,660,000
1954 – 1956 sn#5,000,501 to 5,278,245



Harrington & Richardson
1953 – 1954 sn#4,660,001 to 4,800,000
1954 – 1956 sn#5,488,247 to 5,793,847
Assigned to HRA from Springfield s/n range for a 400-rifle contract overrun:
Aug. 1956 sn#6,034,330 to 6,034,729