Devices, systems and methods of using an ergonomic fore gripgun handle with a concealable and collapsible bipod. An internal power supply voltage generator generates an internal power supply voltage of the semiconductor memory device. The nut is attached to the threaded rod, and the container is attached to the flange with a connector. Disposed therebetween is a rod support ring dividing the trommel into a classifying zone and a discharge zone. It is advantageous that the shadow register stack is closely coupled to its corresponding register, which provides for fast restoration of results.