Package includes: enlarged diameter cylinder, piston head with bearing and enlarged diameter, Bore up nozzle, sealed double aluminium cylinder head with extended diameter. Cylinder set works with S120 or larger type mainspring. Bore-up provides 10 to 20 FPS more stroke speed. The advantage of this set over the standard set is the larger inside diameter of the cylinder, cylinder head, piston head and nozzle.

Weight: 60g