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Conversion Unit .22-.45 Instruction Sheet PDF (457k)
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COLT CONVERSION UNIT .22 - .45 PRODUCTION INFORMATION
Serial Number Production Date
U1 Assembled June 22, 1938
U400 1939
U900 1940
U1100 1941
U1400 1942
U1758 Assembled January 4, 1943
(high pre-WWII serial number)
U2001 Assembled October 17, 1946
U2670 Assembled October 26, 1946
(high post-WWII serial number)
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