The MCX VIRTUS PCP rifle is the latest expansion to the SIG AIR precision line of airguns, and the introduction of SIG AIR products to the pre-charged pneumatic (PCP) category of airguns. The MCX VIRTUS PCP doubles the muzzle energy of classic CO2 models and uses the SIG Rapid Pellet Magazine making it a great tool for target training and defending against unwanted varmints. To achieve peak performance with this air rifle, we recommend using SIG SAUER or equivalent premium pellets with a grain weight listed below. Please Note: *Results may vary based on ammo weight, temperature, and altitude.