The TDC set allows you to modify the hop-up system in the MK23 replicas, provides very easy access to adjustments, and the adjustment itself is extremely precise.
The set includes all the necessary elements, including several spacers of various shapes. The assembly requires partial disassembly of the replica and replacement of the original Hop-Up system. We have access to the adjustment screw from the outside, and the whole design does not differ from the original element.