Remington silencer subsonic ammo is the result of a joint development team comprised of remington & aac.Specifically designed for optimal performance when paired with a silencer with tight velocity control to eliminate supersonic cracks.Caliber: 45 ACPBullet Type: Flat Nose Enclosed Base (FNEB)Bullet Weight: 230 grRounds Per Box: 50Boxes Per Case: 10Casing Material: BrassHazair: YesAmmunition cannot be shipped to a P.O. Box, please use a physical address during checkout. For restricted state buyers (CT, IL, MA and NJ), please email a copy of your state's credentials, and a photo ID along your order number to ffl@firearmsdepot.com&nbsin 5 business days to avoid cancellation and refunding your order. For California and New York buyers, please have your dealer email us a copy of their FFL or Ammo Vendor License along with your order number to ffl@firearmsdepot.com within 5 business days to avoid cancellation and refunding your order. Your order will not ship without us receiving this information. Thank you for your cooperation