Which quadrant sight do I need for a classic carry handle upper ?

[ramairthree]

I think the one that fits the removable carry handle uppers is a little different. I finally put a car 203 fore end and leaf sight on my car 15 with 37mm launcher.

I would like to put the right quadrant sight on also.

Thank you.

[herd118]

https://www.cybershooters.org/?page_id=544
http://www.armystudyguide.com/content/army_board_study_guide_topics/m203/m203-components.shtml