CNN CNN Newsroom April 14, 2013 21:26:00
Semi-automatic only version of the military rifle first introduced in the vietnam war and still used by troops today. >> where's your i.d.? >> it's out in the car. i just didn't want to carry it around. >> i brought it to a gun show a couple weeks ago in columbia and this is big and bulky and there were so many people in there, i kept banging people. that's why i didn't bring it with me. >> 5.56? >> yeah. either one. the .223 or the 5.56. >> any way you can go down $50? >> yeah. i can go down $50. >> all right. you want to walk out, i'll pay you? >> sure. >> the seller takes our offer -- $1,15...