The Blitz, Alexander Arm's New Heavy Hitting Rifle in 6.5 Grendel Alexander Arms is dedicated to bringing today's modern shooter the most cutting edge technology, developing rifle cartridges such as 50 Beowulf and 6.5 Grendel. They also specialize in creating AR15 rifles that function flawlessly with specialty cartridges, from 338 Lapua to the 17 HMR. With innovative design, meticulous engineering, superb manufacturing technology, and uncompromising quality control; Alexander Arms is committed to producing the best weapons systems in the world.