I know I'm posting a lot i just keep coming up with new questions. 1. I've seen bird shot and buck shot discussed but isn't there a "slug" as well? whats this/what does it do? 2. I know i want a 12 gauge either 870 remington or mossburg but i am only 5'1 so i need a shorter gun the primary heights I'm finding are a total of 48' that's 4 feet... am i wrong in thinking a gun that's almost my height wont be easy to shoot? 3. i am on a tight budget so the cheapest but still reliable for home defense. what would you suggest? 4. please assume in your answers that i have never heard a gun term in my life. thank you very much for your help!