Not critisising if that's what you like......but for exactly what reason would you feel the need for a 30-shot magazine hanging out of the bottom of a pump action rifle???
The beauty of the pump action Remingtons (particularly the older Model 14 and 141's) is that they are slim, slick and trim. A magazine hanging out 8" from the bottom would look more like the rifle had some kind of cancerous growth than trim.
Have no plans of useing a 30 round magazine. I like the idea of a .223 in the Remington pump rifle. Lots of coyotes in my area.I bird hunt with a 870 so I should be able to get a few shoots off quick. I will use a 10 round mag when legal.