This is an officially licensed replica of the SIG SAUER P226. This spring pistol fires 12 round clips at 270 FPS and includes a Hop Up system, which is based on the rotation of the ball by friction on an embossing found located within the higher part of the gun. Hop Up is designed to put backspin on the BB's, which gives the BB's a slight upward arc upon firing. This offsets the effect of gravity, reducing wind and air friction which propels the BB's further.