This pack includes:
1x Rubber bucking.1x Silicon bucking.1x fishbone device.
Shark Hop-up Bucking was originally designed to prevent double feeding.
By having 3 special "fins" inside the bucking, Shark Hop-up Bucking can hold one and only one B.B. tightly in the chamber.
Rubber works best in normal temperatures and the silicon works best in cold weather.
Fishbone device:
Traditional hop-up pressure device can apply uneven pressure on to BB's.
The Fishbone device will apply even pressure onto BB's and provides consistent accuracy.