The Factor RC from HatsanUSA is available in .177-, .22- and .25-calibers, and among its many features is the ability to accept commercially available pistol grips and buttstocks made for modern sporting rifles and a reversible cocking lever for ambidextrous operation. The Factor RC’s power output is highly adjustable, featuring an externally variable pressure regulator with its own output pressure gauge. A power level knob controls the amount of air transferred into the barrel. On the opposite side, a hammer preload adjuster helps fine-tune power output and cocking effort and features a removable 580cc carbon-fiber air tank. The Factor RC is also equipped with a Foster-style quick-disconnect fill inlet. MSRP: $1,049.99. Contact: www.hatsan.com