Blue cylinder set for the PTW replicas - M130
The gearbox in which the PTW replicas are equipped with allows the change of the muzzle velocity by changing a homogenous integrated penumatic unit. It is available in three options, which guaranty different muzzle velocities.
The Blue pneuamtic unit with the M130 main spring is a great alternative for assault operations on middle distances.
The replacement of the pneumatic unit is extremely intuitive and should not make any problems in field conditions.
Besides the M130 main spring, inside, there is also a metal spring guide and a piston with all metal teeth.