removing centerfeed magazines

I give up. What's the secret to removing the centerfeed magazine from a Stevens 200 tupperware stock without mangleing the parts? I have tried the search functions to no avail. Pictorials would be appreciated. Thanks, Steve

1 screwdriver under the clip, 1 in the front end.
Pry a little at a time alternatly, in a second ping out it comes.

I've just grabbed one of the feed lips with a pair of needle-nose pliers and pulled it straight out. Yet to even scratch the finish on one, much less mangle it.

Thanks guys--Two screwdrivers-ping- it's out, no damage! Thanks again, this site is awesome!! Steve