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 = 485fpsThe longer the airbrake the quieter the shot but at cost of the fps.Website has been updated đŸ‘đŸŒ

Silverback SRS airbrake piston cup

Artikelnummer: LBSBAAIRBRAKE