A
arizonaguide
Guest
I was researching a bit more on Piston Driven uppers, and ran across this excellent animated diagram. Here is a still shot of the diagram, and just hit the link below for the animated diagram:
CLICK LINK FOR ANIMATED DIAGRAM HERE:
http://www.armytimes.com/projects/flash/2007_02_20_carbine/

CLICK LINK FOR ANIMATED DIAGRAM HERE:
http://www.armytimes.com/projects/flash/2007_02_20_carbine/