It is a Wolverine Reaper Electromechanical HPA system. Very consistent and efficient on HPA. It is tuned for long range engagements and shoots 350ish with a .32g BB. Parts List: Wolverine Reaper Master Mod R-Hopped Barrel MAXX Hop Up Maple Leaf Bucking SPEED Trigger Aftermarket Stock (forgot brand) Foam Filled Suppresor 3x9 Magnified BushNell Optic Aftermarket Rail (forgot brand)