The short answer is the 30 GT was only made in 1979 and 1980. I understand the straight stock was unpopular vs the curved one that they discontinued it in 1980 after less than 8000 units were made.
The 1980 version should have an inlay of the state of Texas. (GT stood for Grand Texan) I own a 1979 version that is only about 200 units older than yours.
manufactured 1970
1975
Yes.
Then it was manufactured before January 1, 1969, when serial numbers were not required on long arms manufactured in the US.
THIS Glenfield MOD 50 BOLT ACTION SHOTGUN WAS MANUFACTURED 1966-1972. I HAVE ONE AND ALSO CANNOT LOCATE THE SERIAL NUMBER.
With the serial number provided,your Glenfield model 60 was made in the year 1973.
Your serial number indicates that your Glenfield model 60 was made in the year 1974.
Your serial number indicates that your Glenfield model 20 bolt action was made in the year 1980.
To determine the age of a Glenfield Model 35 rifle with a serial number starting with "AC," you can refer to the serial number charts specific to Glenfield or Marlin firearms, as Glenfield was a subsidiary of Marlin. Generally, Glenfield rifles manufactured in the 1970s often have serial numbers that begin with "A," and the "C" may indicate a production year around 1972 to 1973. For the most accurate dating, consult resources or forums specializing in vintage firearms or reach out to Marlin's customer service.
With the serial number that you have supplied,your Glenfield rifle was made in the year 1973.
your serial number indicates that your Glenfield rifle was made in the year 1977.
The serial number on a Glenfield model 20 is located on the left side right behind the barrel on the outside of the breech.