Atomic's tactical cycling subsonic is unlike traditional high powered rifle ammunition.Unsuppressed, it is as quiet as most.22 lr and has minimal felt recoil.These relatively innocuous-sounding cartridges, with their low recoil and report, serve professionals with an alternative to much louder standard power rifle cartridges allowing faster follow-up shots and better full auto accuracy with the added safety of not penetrating level 2 and higher armor worn by many law enforcement and military professionals.Specifications: 7.62x39mm/220 gr/hollow point boat-tail (hpbt)/50 bx/ 10 csCaliber: 7.62x39mmBullet Type: Hollow Point Boat TailBullet Weight: 220 grMuzzle Energy: 538 ft lbsMuzzle Velocity: 1050 fpsRounds Per Box: 50Boxes Per Case: 10Application: Home DefenseCasing Material: BrassHazair: Yes