TRIDOS.DESIGN MB01 / L96 Action Army TDC 2.0 ProA word from TRIDOS This TDC 2. 0 modification removes the stock hopup arm mechanism and replaces it with a thumbscrew that pushes down from the top. You can make insanely precise adjustments this way and tune your shooting trajectory to perfection. *This is the PRO version >Compatibility TDC 2. 0 for L96 Action Army is made specifically to be used with AEG bucking and an AEG barrel. Our TDC's are designed to fit only a specific chambers. Here are the