I need help. Lets talk "assault rifles"

im not new to guns but i dont get really into them as much as others do. i have a simple 9MM S&W semi auto pistol. had it for 20 years. i used to shoot it pretty often, got ouot of it for a while and now getting back into it again lately...

before Im not able to buy one, i wanna buy myself at least 2 rifles. I know i want 1 to be 9MM cause thats the ammo i have been collecting and when the zombies come, i dont wanna worry about which ammo to have on me. :) i have shot this one and liked it:

http://www.berettausa.com/products/cx4-storm/



the other needs to be 45 acp. im thinking this one:

http://www.gunsinternational.com/-Kr...n_id=100303017


my question is, what accessories or mods should i worry about ?
Author: plumcrazy