300 Blackout 110GR Bone Frog Ammunition® Barnes TAC-TX (B300BLKTACTX110)300 Blackout 110GR Bone Frog Ammunition Barnes TAC TX (B300BLKTACTX110) The TAC TX bullet is a special purpose expanding all copper bullet that is optimized around AR platforms. AR rifles feature shorter carbine length barrels which reduce the muzzle velocity when compared to a standard barrel length. To achieve the same terminal performance that Barnes fans are used to, Barnes added a larger tip to allow more fluid to enter the nose and modified the