IF-5, .22 LR with Brown/Gray Sporter Stock The IF-5 is the total package; what every shooter is looking for - lightweight, great balance and most of all incredible accuracy. The I-Fluting increases surface area, reduces weight and adds rigidity to the barrel more than any other fluting design Volquartsen offers. This means maximum heat dissipation and unbelievable accuracy all from a barrel that is 12 oz. lighter than a bull barrel. The IF-5 comes standard with a Forward Blow Compensator to give it that added touch - in looks and performance.