These come supplied with 3 airbrake lengths - tests with a 0.20g bb on a Sportline with M160 spring, standard piston and standard hop:Long = 415fpsMedium = 470fpsShort = 485fps

 

The longer the airbrake the quieter the shot but at cost of the fps.

Silverback SRS airbrake piston cup

SKU: LBSBAAIRBRAKE
15,00£Precio