Easton FMJ Max 5mm Match Grade Shafts - 12 packThe Easton FMJ Max is the next evolution of the Full Metal Jacket the arrow that redefined penetration for serious big game hunters. The Max version takes everything that made the original FMJ legendary and makes it lighter, more versatile, and more precise. With a 5mm carbon core wrapped in a 7075 aluminum alloy jacket, the FMJ Max delivers the bone crushing penetration of a heavy metal arrow with 1. 5 gpi average weight savings over the previous 5mm