This G&P Piston and Sector gear are pre- short stroked ( saving you a lot of work). Short Stroking: the removing of 1 or more teeth on the piston and removing the equivalent on the sector gear, what this does releases the piston before it makes its full cycle allowing it to move faster preventing the sector gear from catching it on its way forward which happens at high speeds, this prevents pre-mature waring on the piston it also increase the rps of your gun 1-2 however you do loose around 20-50 fps.


* PLEASE NOTE THIS VERSION IS FOR BARRELS 409mm AND UNDER*