You have a cartridge which will work in an AR-15 or mini bolt action. It uses 6mm bullets which can range from 55 to 108 grains. The recoil energy is around 6 ft lb. It carries over 1000 ft/lb of energy past 400 yards. Plus it is being used by the military. A nice light weight, low recoil option for varmints/deer/pronghorn. I know I don't always like the new thing, but I kinda like this one.