If you wanna stay with 556 and just want something to sling lead, I recommend a kel tec su16. Its a very under rated gun, and you already have the mags! Ib my experience, they are good for me out to 200 yards. Though, I have seen people push it out further with the su16
Thats a good candidate. I was looking on line and I noted an a b c models. What's the difference? Also I have never seen one in person, please do not be offended by this, but the gun looks plastic in nature. How sturdy is the "feel" of the firearm?
then next on my list is a combloc battle stick. Just really like the looks of those things for awhile now. It's next.