Try here. http://www.e-gunparts.com/model.asp?idDept=95
Parts are kind of spendy for a gun that was pretty cheap. Although, this was also my first gun back in 1978. I assume, like myself, you want parts more for the keepsake part than the value part. Ahhh...the memories.
Call Marlin Customer Service 800-544-8892. Place orders there. Part # 504046. Glenfield 20 is same as Marlin Model 780, except for the wood.
Your serial number indicates that your Glenfield model 20 bolt action was made in the year 1980.
http://www.rimfirecentral.com/forums/forumdisplay.php?f=20 helps if you tell us your Model Number.
Glenfield Marlin Model 25 rifles were patterned after the Marlin 80C and Marlin 780 rifles. The Glenfield name was added for sales to coast-to-coast chain-stores versus stores that were specific Marlin dealer stores. The Glenfield 25 was manufactured from 1979 through 1982 according to Brophy. Others would suggest the Marlin Glenfield 25 was produced from 1972-1982. Regardless, the Glenfield name was dropped in 1983. The rifle continued as the Marlin Model 25 until 2003, which then became the Marlin 925. Differences between the Marlin and Glenfied were purely cosmestic i.e. birch stocks instead of walnut stock, different trigger guards, and triggers (black instead of gold colored). It is still being produced in .22LR (Marlin 925) and .22 Magnum (Marlin 925M) versions today. Most parts between the Glenfield 25 and Marlin 780 will interchange with no problem. Some of the Glenfield 20 and 25 will interchange as well. However, not all late model parts between the Marlin 780 and Marlin 80 will interchange with those models made in the pre-70s.
$90.00 to $40.00 depending on condition.
Glenfield was made by Marlin. Check with a local gun shop.
Made between 1960 and 1966.
The Glenfield model 75C is a carbine variant of the Marlin model 60 produced for 1975 to 1992 by th m Mrlin Firearms Company under the name of Glenfield. Differences include shorter 18 inch barrel compared to the Marlin's 20. Length of pull on the Glenfield is shorter. The Glenfield also has a shorter and lower capacity magazine tube. The Glenfield hold 9 shots in the magazine, while current Marlins hold 15. Nearly all parts are interchangeable, and the Glenfield can be converted to modern full sized Marlin 60 specifications if desired.
On my model 20 its on the left side of the barrel directly up from the clip.
The Marlin model 20 was introduced in 1966. It became the model 80. Value is approx. $125. to $160. Answer courtesy of Teddy Roosevelt at Gallery of Guns
Glenfields are Marlins marked for sale by 'second-tier' retailers.
the gun was made during the 60s and 70s so the stock maybe somewhere there