Description PRODUCT DETAIL:Manufacturer: Winchester Caliber: 5.56mm Grain: 77 gr Bullet Type: HPBT Velocity: 2750 fps Rounds: 20 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.