The Sig Sauer MCX Virtus PCP 22 Caliber Air 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.The HPA bottle is intended to be filled with compressed air only. Do not use a standard air compressor or bicycle pump. Use only a high pressure hand pump or high pressure tank that is capable of filling >/= 3000PSI onlyFeaturesIncluded HPA Bottle that is Refillable Perfect for target training and varmitGreater velocity than classic C02 modelsNotePump not included