They are all 223, and different barrel lengths. What makes them most valuable to me is the .22lr conversion units, from Jon Ciener, $150. They can be fun plinkers, good small game rifles, and great trainers for a combat rifle, too. With good ammo and careful shooting, the 223 handles deer just fine, at 30-30 type ranges (ie, sub 150 yds). The 60 gr Nosler Partition softpoint is the way to go for 223's on deer, hogs, pronghorn and defense.