sig venom lead pellet .22 cal 14.5gr 2x250ct and virtus airrifle combo kit .22cal 30rd 3 extra belts bundle (for virtus .22 cal only) | not for mcx/mpx .177 venus it is not compatible with .177 cal mcx/mpx airrifles. 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. this magazine and pellets bundle is compatible only with mcx virtus pcp .22 cal air rifle.