Blaser - 12oz. Kickstop recoil reducer :

For rifles and combination guns. The stainless steel cylinder is filled with granulated tungsten. It is inserted in the firearms stock and provides �absorption of approximately 20 percent of felt recoil. The stock weight is increased, optimizing the balance of firearms with heavy barrels.

Length: 126mm (5"), weight: approx. 370g (12 oz.)