It's sleek profile and its "swinging block" lever action design make this muzzleloader one of the simplest and no nonsense muzzleloaders on the market...Simple to operate; Simple to clean. Swinging Block Lever Action Design: The Omega's unique action operates by using the forward motion of the trigger guard lever to swing the breech block downward, allowing easy access to the 209 primer pocket. Once primed, the lever is pulled rearward, raising the breech block and sealing the breech. This closed breech design protects the 209 primer from rain, snow or sleet.