ULTIMATE M150 Spring Type_3-9x40 The Sopmod sports a unique

The Sopmod sports a unique bolt lock feature which locks the bolt back and stops the rifle from shooting when the last BB is fired

Adjustable hop-up is incredibly accurate

If you wish to install a precision barrel that enters into the silencer

The pistol is made from a mix of polymer and metal just like the real steel

ULTIMATE M150 Spring Type_3-9x40 The Sopmod sports a uniqueHigh quality spring from ULTIMATE. These are double progressive springs which make sure the torque of the motor is used to its full extent, giving a higher rate of fire. This spring is chromium plated which minimizes the friction of the spring on the piston. Black in colour. Chromium plating also does not wear or chip leaving debris in the gearbox like paint treated springs. M150 produces approx 490fps, suitable for use in UK European games.