AIRTECH STUDIOS Retroarms Hop-Up Chamber TCU True Centering Unit

Specially designed for Retroarms Hop-up units to address the problem of axial displacement of the chamber caused by two factors. First, the outer barrel and chamber do not fit perfectly together; This is due to the difference in tolerances between the different brands. On the other hand, the two fins on each side of the camera do not provide adequate grip to prevent the camera from rocking to the left or right. The True Centering Unit (TCU) will close this gap to prevent unwanted movement. Second, loose magazines that could rotate the hop-up and inner barrel. This also occurs when shooting semi-auto or full auto when the balls move up the chamber.