The Heavy Barrel model has a synthetic butt with cheek rest and a heavy barrel. With the T-wrench you can easily change the barrel. Four different calibers are available to choose from. The weapon has a mechanism with two locking lugs, 50° opening angle on the bolt handle, 40 mm opening distance on the bolt and 5 mm stroke. The magazine takes 5 cartridges of the above calibers. Also available for 10 cartridges (for 9 cartridges for cal 22 WMR and 17 HMR). Color codes at the bottom of the magazines indicate which calibers can be applied. The trigger is adjustable 1-2 kg. The safety is located behind the bolt handle and it locks both the trigger and the bolt. The stock is straight and with a pistol grip, suitable for both right- and left-handers. The material is glass-fiber reinforced copolymer polypropylene with cheek rest and butt plate that can be length adjusted with washers. The barrels are cold-hammered, heavy, completely free-standing and have colored rings that mark the caliber.