Ok I got some New glock 19 magazines marked/LE  It has the number "4"marked on the follower well i loud up the mag with a full 15 rds and it makes a loud rattle, some of the mags its louder than others.Is this normal?

Also is it a drop free magazine I can return But usually within 20 days I want to make sure these are as good as the current production...


Basically how can you tell apart the different generations of GLOCK MAGS...

thanks

www.glockfaq.com/magazine.htm--this might help