The Gamo Whisper Fusion Mach 1 is equipped with an IGT Mach 1 power plant, the most powerful gas piston technology from Gamo. It shoots a pellet at up to 1020 fps thanks to the larger 33mm cylinder. This air rifle also features Whisper Fusion sound dampening, the quietest noise reduction technology patented by Gamo. The pellet goes through two different chambers, compressing and preventing noise expansion. Combining the Whisper Fusion and IGT Mach 1 technologies makes this rifle quiet, powerful and accurate, and it does not produce intense vibration like a traditional spring piston. It is equipped with a Gamo 3-9×40 scope. The synthetic stock has a comfortable, ambidextrous cheek piece. The Gamo Whisper Fusion Mach 1 also features a CAT (Custom Action Trigger) that allows you to adjust the 1st and 2nd stage to your preference. It also has the Recoil Reducing Rail (RRR) that absorbs the recoil and reduces the stress on the scope by almost 100 percent. 5 YEAR WARRANTY. WHISPER FUSION NOISE DAMPENING TECHNOLOGY Gamo’s patented Whisper technology leads the air rifle industry in sound suppression. This technology is categorized into three tiers—Whisper, Whisper Maxxim and Whisper Fusion—for quiet, quieter, and quietest performance. However, “noise reduction” does not mean “silence,” as sound levels will vary depending upon pellet choice. A lighter, faster and smaller caliber pellet, for instance, will produce a louder sound than a heavier, slower and higher caliber pellet. To further assist with your purchasing decision, please refer to the chart above. The Whisper® Fusion® technology incorporates a double integrated sound moderator making it the quietest Gamo air rifle. The pellet travels through two different chambers, compressing and preventing the noise expansion. IGT MACH1 (Inert Gas Technology) Gas Piston Based off the groundbreaking IGT platform, the IGT MACH 1™ replaces the standard spring power plant with an Inert Gas Cylinder, but the IGT MACH 1’s monster 33 millimeter cylinder delivers more velocity and terminal penetration. The pneumatic cylinder rockets pellets up to 1420 Feet Per Second (fps) in .177 caliber (with PBA Platinum Ammo), and promotes smooth and consistent cocking efforts with constant power delivered to any pellet you shoot. If you want: More Precision, Less Vibration and True Knock Down Power. Make sure your next Gamo has the IGT MACH 1 inside. CAT (Custom Action Trigger) The revolutionary C.A.T (Custom Action Trigger) enables Gamo air rifle owners to independently adjust the 1st and 2nd stages of their trigger to tailor the trigger pull and crispness to their personal preference. Simply loosen the 1st stage adjustment screw and the trigger travel increases. If a shorter travel length is desired just tighten the same screw to decrease the 1st Stage travel length. The 2nd Stage Adjustment is made just as easily —unscrew the adjustment setting to increase the 2nd Stage travel length or decrease it by screwing in the same adjustment point.