Description PRODUCT DETAIL:Caliber: .223 Remington Number of Rounds: 20 Bullet Type: Spitzer Bullet Weight: 55 Grain Cartridge Case Material: Brass Muzzle Velocity: 3240 ft/s Ammunition Application: Self Defense Primer Location: Centerfire Muzzle Energy: 1282 ft/lbs Firearms, trailers, and some accessories are only available for purchase in stores. Each location follows all BATF and individual state/county/city laws to insure the desired product is legal for sale. Any info provided online is subject to change, please go to your local store for more accurate information.