Actually, Marlin is supposed to have sold 6 million Model 60s as of 2010. Ruger has sold 4 million 10/22s.
I sure don't know where you got that info. I've seen the numbers I quoted many times in many places. Actually most of the quotes are the last released numbers by both companies which are 11 million 60's and 5 million 10/22's. But I've heard those numbers have increased since they were first released.
Here's a few places I found those numbers.
http://en.wikipedia.org/wiki/Marlin_Model_60
Quote - "Number built over 11 million, 1960 - present"
I could quote Chucky here but he's off limits I believe.
http://www.marlin60.com/
Quote - "...the best selling .22 LR in history with over 11 Million rifles sold."
http://www.guns.com/reviews/marlin-model-60.html
Quote - "Marlin has sold more than 11 million M60s..."
http://www.riflenotes.com/marlin-60.html
Quote - "Sales of the semi auto rifle have now surpassed 11 million."
http://pawpawshouse.blogspot.com/2009/03/marlin-model-60.html
Quote - "Marlin has made over 11 million of them."
Now for the Ruger quotes:
http://www.gunblast.com/Ruger-1022.htm
Quote - "...Ruger has sold over 5.7 million of the little jewels (10/22's)."
http://en.wikipedia.org/wiki/Ruger_10/22
Quote - "Number built over 5 million, 1964-present"
http://drfrankenruger.com/ruger_1022_parts
Quote - "With over six million Ruger 10/22 rifles sold...(shows more up to date info)"
http://www.heguns.com/gunsmith-tips-from-agi-rugar-10-22-c-14_15
Quote - "...the Ruger 10/22 - with over 5 million manufactured so far..."
I think this is enough data to prove my point. Here's some more useful info. Marlins are NOT hard to disassemble. They go back together very easily. They are very reliable. They do not wear out easier. They are not inferior rifles compared to the Rugers. And to all the other myths and half truths floating around I say horse hockey. I've been shooting the 60 almost since it came out. Someone actually seems to think that 4 more years makes all the difference in sales figures. Horse hockey. There is no big aftermarket for Marlins because there is no need for one. Marlins shoot exceptionally well right out of the box. I just posted a groups that was well under MOA at 90 yards. I can shoot half inch groups at 50 yards with my 60SS all day long. I used to shoot the entire bullseye out of a Shoot N See target with about 15 rounds a couple of months after I bought that rifle. That's knocking out every piece of orange on the target. Try it sometime. I have cut weeds in two at 50 yards with it. I used to shoot bats flying with my old one.
I'm not new to shooting. I'm not new to Marlin 60's. Like I said before I grew up shooting a 60 and it never failed to work or shoot accurate that I knew about. I was shooting one by 1966 when I was 10 years old. I don't think there' been more than 5 years in all that time that I didn't have access to one between my dad's rifle and my brother. I think I might have learned a few things about them in all that time.