See if this helps - http://stevespages.com/pdf/marlin_60.pdf Don't however dissasemble the lower reciever. Its sandwiched between two peices of steel. If you take those apparty, trust me, you will have a horrible time putting it back together.
The Glenfield 22 model 75 is the same as the Marlin 75. It was made for Sears and the parts probably can be obtained from Marlin In New Haven, Connecticut. This site has parts for the Glenfield model 75. http://www.gunpartscorp.com/ I have them. www.countrygunsmith.net
Your Glenfield model 75C will go for between 50-75 dollars on today's market.
mine holds 9.
Try looking up www.e-gunparts.com
About 75
Try this link--- http://oldguns.net/sn_php/marlinlookup.php
http://www.sellmystuff.com.au is the best place to buy and sell items.
Around $75.
The Glenfield Model 75 was produced from the years 1960 to present. Unfortunately, the Glenfield 60 inner firing parts will not fit a model 75 Glenfield.
The Glenfield Model 75, a .22 caliber rifle, was produced by Marlin Firearms and manufactured from 1970 until approximately 1987. It was designed as a more affordable version of the Marlin Model 60 and became popular for its reliability and accuracy. The rifle features a semi-automatic action and a tubular magazine.
you should be able to find everything at this site www.e-gunparts.com/dept.asp drawings and parts
Inexpensive .22 semiauto rifle based on the Marlin Model 60. Sold through mass-market stores.