Nine Ball G18C feather weight weight piston succeeded in innovative weight saving by remaking heavy zinc diecast breech made of light resin. 

As a result, the blow back speed has dramatically improved, and if the speed is raised any further, the bullet can not catch up. 

Even with the Hi-CAPA model already on sale, the effect of reducing the weight of breech, such as the speed of double tap due to increased blowback speed, easiness of sighting by recoil at blow back, has been proven However, in the G18C which can be fired with full auto, its effect is even more, even the long magazine will shoot a moment.