Description PRODUCT DETAIL:Cartridge: 5.56x45mm NATO Grain Weight: 62 Grains Quantity: 20 Round Muzzle Velocity: 3000 Feet Per Second Muzzle Energy: 1239 Foot Pounds Bullet Style: Solid Hollow Point Bullet Brand And Model: Barnes Triple-Shock X Lead Free: Yes Case Type: Brass Primer: Boxer Corrosive: No Reloadable: Yes Velocity Rating: Supersonic Country of Origin: United States of America 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.