Hop Up Bucking 4uad 4uantum Friction Pro GBB

By using this 4uad 4uantum Friction Pro GBB hop up bucking, you’re going for ultimate consistency. It ensures contact at the perfectly centred axis of the BB’s spin, so you’re shooting every BB with the same amount of hop. This allows you to shoot considerably tighter groups. The 4uad 4uantum Friction Pro GBB hop up bucking uses a nub with a unique contour to achieve that centred point of contact.