.227 Sig Fury Hybrid is the commercial version of the U.S. Army’s 6.8x51mm ammunition. These high-velocity cartridges out performs ammunition of the same class by delivering increased energy on target and decreased bullet drop. They feature a unique construction of a stainless steel base attached to the bass case via locking washer. Because steel has a far greater yield strength than brass, .227 Sig Fury Hybrid cartridges are capable of producing much more pressure for greater muzzle velocity and energy.