4 Variants and Alternative Calibers Every Fan of the AR 15 Should Check Out

The 223 Remington/556 NATO cartridge combo is an effective one, balancing admirable range, recoil, and performance. It makes sense that the pair serve as the caliber foundation for the current reigning champion in the centerfire long gun arena—the AR 15 platform. However, the rifle platform itself is so modular and accessory-friendly that it has been adapted to accommodate a whole galaxy of different chamberings. While all those chamberings have their uses, gun enthusiasts can also consider using a few alternatives, like the AR 12 and 300 Blackout.